diff --git a/srcs/Http/HTTPRequest.cpp b/srcs/Http/HTTPRequest.cpp
index 7beb6a7e..36c94456 100644
--- a/srcs/Http/HTTPRequest.cpp
+++ b/srcs/Http/HTTPRequest.cpp
@@ -125,20 +125,6 @@ void HTTPRequest::Parse(std::string str) {
     }
 }
 
-// utilにあってもいいかも
-// OWSをtrimする
-static std::string ltrim(const std::string &s) {
-    size_t start = s.find_first_not_of(" \t");
-    return (start == std::string::npos) ? "" : s.substr(start);
-}
-
-static std::string rtrim(const std::string &s) {
-    size_t end = s.find_last_not_of(" \t");
-    return (end == std::string::npos) ? "" : s.substr(0, end + 1);
-}
-
-static std::string trim(const std::string &s) { return rtrim(ltrim(s)); }
-
 void HTTPRequest::ParseRequestLine(std::string line) {
     this->logging_.Debug("ParseRequestLine");
     std::vector<std::string> items = Split(line, " ");
@@ -169,7 +155,7 @@ void HTTPRequest::ParseHeader(std::string str) {
             throw std::runtime_error("header format invalid");
         }
         std::string header = lines[i].substr(0, found);
-        std::string value = trim(lines[i].substr(found + 1));
+        std::string value = Trim(lines[i].substr(found + 1), " \t");
         if (value.empty()) {
             // TODO(hayashi-ay): 対応するエラーを定義する
             throw std::runtime_error("header format invalid");
diff --git a/srcs/Utils/utils.cpp b/srcs/Utils/utils.cpp
index e4175a59..e09280de 100644
--- a/srcs/Utils/utils.cpp
+++ b/srcs/Utils/utils.cpp
@@ -67,6 +67,18 @@ bool IsInteger(std::string str) {
 
 int ToInteger(std::string str) { return std::atoi(str.c_str()); }
 
+std::string LeftTrim(const std::string& s, const std::string& chars) {
+    size_t start = s.find_first_not_of(chars);
+    return (start == std::string::npos) ? "" : s.substr(start);
+}
+std::string RightTrim(const std::string& s, const std::string& chars) {
+    size_t end = s.find_last_not_of(chars);
+    return (end == std::string::npos) ? "" : s.substr(0, end + 1);
+}
+std::string Trim(const std::string& s, const std::string& chars) {
+    return RightTrim(LeftTrim(s, chars), chars);
+}
+
 bool StartsWith(const std::string& s, const std::string& prefix) {
     return s.find(prefix, 0) == 0;
 }
diff --git a/srcs/Utils/utils.hpp b/srcs/Utils/utils.hpp
index d927bd02..150a50e5 100644
--- a/srcs/Utils/utils.hpp
+++ b/srcs/Utils/utils.hpp
@@ -9,9 +9,12 @@ std::vector<std::string> Split(std::string const str, std::string const delim);
 std::string Join(std::vector<std::string> strs, std::string separator);
 
 bool IsInteger(std::string str);
-
 int ToInteger(std::string str);
 
+std::string LeftTrim(const std::string& s, const std::string& chars);
+std::string RightTrim(const std::string& s, const std::string& chars);
+std::string Trim(const std::string& s, const std::string& chars);
+
 bool IsDigit(const char c);
 
 bool IsAlpha(const char c);
diff --git a/tests/unit_test/utils.cpp b/tests/unit_test/utils.cpp
index 8d4282be..26059043 100644
--- a/tests/unit_test/utils.cpp
+++ b/tests/unit_test/utils.cpp
@@ -80,3 +80,12 @@ TEST(ToInteger, normal) {
     ASSERT_EQ(2147483647, ToInteger("2147483647"));
     ASSERT_EQ(-2147483648, ToInteger("-2147483648"));
 }
+
+TEST(Trim, normal) {
+    std::string str = " \t42 \t";
+    std::string chars = " \t";
+
+    ASSERT_EQ("42 \t", LeftTrim(str, chars));
+    ASSERT_EQ(" \t42", RightTrim(str, chars));
+    ASSERT_EQ("42", Trim(str, chars));
+}