diff --git a/lib/fluent/plugin/in_http.rb b/lib/fluent/plugin/in_http.rb
index 9552e7e8d6..efff85bbb9 100644
--- a/lib/fluent/plugin/in_http.rb
+++ b/lib/fluent/plugin/in_http.rb
@@ -78,10 +78,16 @@ def configure(conf)
             @parser_json = parser_create(usage: 'parser_in_http_json', type: 'json')
             @parser_json.estimate_current_event = false
             @format_name = 'default'
+            @parser_time_key = if parser_config = conf.elements('parse').first
+                                 parser_config['time_key'] || 'time'
+                               else
+                                 'time'
+                               end
             method(:parse_params_default)
           else
             @parser = parser_create
             @format_name = @parser_configs.first['@type']
+            @parser_time_key = @parser.time_key
             method(:parse_params_with_parser)
           end
       self.singleton_class.module_eval do
@@ -203,14 +209,13 @@ def on_request(path_info, params)
               single_record['REMOTE_ADDR'] = params['REMOTE_ADDR']
             end
 
-            if single_record.has_key?('time')
-                single_time = Fluent::EventTime.from_time(Time.at(single_record['time']))
-
-                unless @parser and @parser.keep_time_key
-                    single_record.delete('time')
-                end
+            if single_record.has_key?(@parser_time_key)
+              single_time = Fluent::EventTime.from_time(Time.at(single_record[@parser_time_key]))
+              unless @parser and @parser.keep_time_key
+                single_record.delete(@parser_time_key)
+              end
             else
-                single_time = time
+              single_time = time
             end
 
             mes.add(single_time, single_record)
diff --git a/test/plugin/test_in_http.rb b/test/plugin/test_in_http.rb
index 9e8c6bbde8..f3442a6b33 100644
--- a/test/plugin/test_in_http.rb
+++ b/test/plugin/test_in_http.rb
@@ -162,6 +162,29 @@ def test_multi_json_with_time_field
     assert_equal_event_time time, d.events[1][1]
   end
 
+  def test_multi_json_with_time_key
+    d = create_driver(CONFIG + %[
+      <parse>
+        time_key missing
+      </parse>
+    ])
+    time = event_time("2011-01-02 13:14:15 UTC")
+    time_i = time.to_i
+    time_f = time.to_f
+
+    records = [{"a" => 1, 'time' => time_i},{"a" => 2, 'time' => time_f}]
+    tag = "tag1"
+    res_codes = []
+    d.run(expect_records: 2, timeout: 5) do
+      res = post("/#{tag}", {"json" => records.to_json})
+      res_codes << res.code
+    end
+    assert_equal ["200"], res_codes
+    assert_equal 2, d.events.size
+    assert_not_equal time_i, d.events[0][1].sec # current time is used because "missing" field doesn't exist
+    assert_not_equal time_i, d.events[1][1].sec
+  end
+
   def test_json_with_add_remote_addr
     d = create_driver(CONFIG + "add_remote_addr true")
     time = event_time("2011-01-02 13:14:15 UTC")