diff --git a/Qsi.Tests/Vendor/PostgreSql/Driver/PostgreSqlRepositoryProvider.cs b/Qsi.Tests/Vendor/PostgreSql/Driver/PostgreSqlRepositoryProvider.cs
index 4541cd2b..1dee064c 100644
--- a/Qsi.Tests/Vendor/PostgreSql/Driver/PostgreSqlRepositoryProvider.cs
+++ b/Qsi.Tests/Vendor/PostgreSql/Driver/PostgreSqlRepositoryProvider.cs
@@ -7,6 +7,7 @@
 using Qsi.Data.Object;
 using Qsi.Data.Object.Function;
 using Qsi.Engines;
+using Qsi.PostgreSql.Data;
 using Qsi.Utilities;
 
 namespace Qsi.Tests.PostgreSql.Driver;
@@ -76,7 +77,7 @@ from information_schema.TABLES
         }
 
         sql = $@"
-select COLUMN_NAME 
+select COLUMN_NAME, IS_NULLABLE, COLUMN_DEFAULT
 from information_schema.COLUMNS
 where TABLE_CATALOG = '{table.Identifier[0]}' and TABLE_SCHEMA = '{table.Identifier[1].Value}' and TABLE_NAME = '{table.Identifier[2].Value}'
 order by ORDINAL_POSITION";
@@ -87,6 +88,8 @@ from information_schema.COLUMNS
             {
                 var column = table.NewColumn();
                 column.Name = new QsiIdentifier(reader.GetString(0), false);
+                column.IsNullable = reader.GetString(1) == "YES";
+                column.Default = reader.IsDBNull(2) ? null : reader.GetString(2);
             }
         }
 
diff --git a/Qsi.Tests/Vendor/PostgreSql/PostgreSqlTest.cs b/Qsi.Tests/Vendor/PostgreSql/PostgreSqlTest.cs
index e2909558..7f3cd4e7 100644
--- a/Qsi.Tests/Vendor/PostgreSql/PostgreSqlTest.cs
+++ b/Qsi.Tests/Vendor/PostgreSql/PostgreSqlTest.cs
@@ -274,6 +274,38 @@ public async Task Test_DML(string query, string[] expectedQueries, int expectedR
         Assert.Pass();
     }
 
+    /// <summary>
+    /// Insert Action 시 Not Null 제약조건 있는 테이블에 값 대입하는 상황에 관한 에러 처리를 확인하는 테스트를 수행합니다.
+    /// </summary>
+    [Test]
+    public async Task Test_InsertNotNull()
+    {
+        const string CreateTableQuery = @"create table if not exists test_not_null (
+col1 VARCHAR NOT NULL,
+col2 VARCHAR
+)";
+
+        var command = Connection.CreateCommand();
+        command.CommandText = CreateTableQuery;
+        await command.ExecuteNonQueryAsync();
+
+        string[] queries =
+        {
+            "INSERT INTO test_not_null VALUES (null, 'test')",
+            "INSERT INTO test_not_null (col2) VALUES ('test')"
+        };
+
+        const string errorMessage = "QSI-0021: The column 'col1' has a Not Null constraint.";
+
+        foreach (var query in queries)
+        {
+            Assert.ThrowsAsync<QsiException>(async () =>
+            {
+                await Engine.Execute(new QsiScript(query, QsiScriptType.Insert), null);
+            }, errorMessage);
+        }
+    }
+
     /// <summary>
     /// Parameterized query에 대하여 테스트를 수행합니다.
     /// </summary>
diff --git a/Qsi/Analyzers/Action/QsiActionAnalyzer.cs b/Qsi/Analyzers/Action/QsiActionAnalyzer.cs
index 0085dc47..5b7c2027 100644
--- a/Qsi/Analyzers/Action/QsiActionAnalyzer.cs
+++ b/Qsi/Analyzers/Action/QsiActionAnalyzer.cs
@@ -466,6 +466,10 @@ protected virtual async ValueTask<IQsiAnalysisResult[]> ExecuteDataInsertAction(
         }
 
         ColumnTarget[] columnTargets = await ResolveColumnTargetsFromDataInsertActionAsync(context, table, action);
+        var columnWithInvalidDefault = ResolveNotNullableColumnWithInvalidDefault(table.Columns, columnTargets);
+
+        if (columnWithInvalidDefault is not null)
+            throw new QsiException(QsiError.NotNullConstraints, columnWithInvalidDefault.Name.Value);
 
         var dataContext = new TableDataInsertContext(context, table)
         {
@@ -617,6 +621,14 @@ protected virtual SetColumnTarget ResolveSetColumnTarget(
         );
     }
 
+    protected virtual QsiTableColumn ResolveNotNullableColumnWithInvalidDefault(IEnumerable<QsiTableColumn> columns, IEnumerable<ColumnTarget> columnTargets)
+    {
+        HashSet<string> targetNames = columnTargets.Select(ct => ct.DeclaredName.SubIdentifier(0).ToString()).ToHashSet();
+
+        return columns
+            .FirstOrDefault(x => !targetNames.Contains(x.Name.Value) && !x.IsNullable && x.Default is null);
+    }
+
     private async ValueTask ProcessQueryValues(TableDataInsertContext context, IQsiTableDirectivesNode directives, IQsiTableNode valueTable)
     {
         var engine = context.Engine;
@@ -745,6 +757,9 @@ private void PopulateInsertRow(TableDataInsertContext context, DataValueSelector
                 item = pivot.SourceColumn is not null
                     ? valueSelector(pivot)
                     : ResolveDefaultColumnValue(pivot);
+
+                if (item.Value is null && target.Table.Columns[pivot.DestinationOrder].IsNullable == false)
+                    throw new QsiException(QsiError.NotNullConstraints, pivot.DestinationColumn.Name.Value);
             }
 
             target.InsertRows.Add(targetRow);
diff --git a/Qsi/Data/Table/QsiTableColumn.cs b/Qsi/Data/Table/QsiTableColumn.cs
index 24fe30bb..398610fb 100644
--- a/Qsi/Data/Table/QsiTableColumn.cs
+++ b/Qsi/Data/Table/QsiTableColumn.cs
@@ -35,6 +35,8 @@ public bool IsExpression
         set => _isExpression = value;
     }
 
+    public bool IsNullable { get; set; } = true;
+
     internal QsiQualifiedIdentifier ImplicitTableWildcardTarget { get; set; }
 
     internal bool _isExpression;
@@ -52,6 +54,7 @@ internal QsiTableColumn CloneInternal()
         column.ImplicitTableWildcardTarget = ImplicitTableWildcardTarget;
         column._isExpression = _isExpression;
         column.HasIndex = HasIndex;
+        column.IsNullable = IsNullable;
 
         return column;
     }
diff --git a/Qsi/QsiError.cs b/Qsi/QsiError.cs
index a8a6b7fd..62984b14 100644
--- a/Qsi/QsiError.cs
+++ b/Qsi/QsiError.cs
@@ -34,7 +34,8 @@ public enum QsiError
     ParameterNotFound,
     InvalidNestedExplain,
     SubqueryReturnsMoreThanRow,
-    UnableResolveFunction
+    UnableResolveFunction,
+    NotNullConstraints
 }
 
 internal static class SR
@@ -72,6 +73,7 @@ internal static class SR
     public const string InvalidNestedExplain = "Invalid nested explain for '{0}'";
     public const string SubqueryReturnsMoreThanRow = "Subquery returns more than {0} row";
     public const string UnableResolveFunction = "Unable to resolve function '{0}'";
+    public const string NotNullConstraints = "The column '{0}' has a Not Null constraint.";
 
     public static string GetResource(QsiError error)
     {
@@ -110,6 +112,7 @@ public static string GetResource(QsiError error)
             QsiError.InvalidNestedExplain => InvalidNestedExplain,
             QsiError.SubqueryReturnsMoreThanRow => SubqueryReturnsMoreThanRow,
             QsiError.UnableResolveFunction => UnableResolveFunction,
+            QsiError.NotNullConstraints => NotNullConstraints,
             _ => null
         };
     }