diff --git a/README.md b/README.md
index 8729ae5..985629e 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,8 @@ sslca|path to ca cert(default: nil)
 sslcapath|path to ca certs(default: nil)
 sslcipher|ssl cipher(default: nil)
 sslverify|verify server certificate(default: nil)
+encoding|encoding(default: nil)
+collation|collation(default: nil)
 column_names|bulk insert column (require)
 key_names|value key names, ${time} is placeholder Time.at(time).strftime("%Y-%m-%d %H:%M:%S") (default : column_names)
 json_key_names|Key names which store data as json, comma separator.
@@ -41,6 +43,8 @@ on_duplicate_update_keys|on duplicate key update column, comma separator
   database test_app_development
   username root
   password hogehoge
+  encoding utf8mb4
+  collation utf8mb4_unicode_ci
   column_names id,user_name,created_at,updated_at
   table users
   flush_interval 10s
diff --git a/lib/fluent/plugin/out_mysql.rb b/lib/fluent/plugin/out_mysql.rb
index 6fdb12a..4ce84df 100644
--- a/lib/fluent/plugin/out_mysql.rb
+++ b/lib/fluent/plugin/out_mysql.rb
@@ -15,6 +15,8 @@ class Fluent::MysqlOutput < Fluent::BufferedOutput
   config_param :sslcapath, :string, :default => nil
   config_param :sslcipher, :string, :default => nil
   config_param :sslverify, :bool, :default => nil
+  config_param :encoding, :string, :default => nil
+  config_param :collation, :string, :default => nil
 
   config_param :key_names, :string, :default => nil # nil allowed for json format
   config_param :sql, :string, :default => nil
@@ -112,6 +114,8 @@ def client
         :sslcapath => @sslcapath,
         :sslcipher => @sslcipher,
         :sslverify => @sslverify,
+        :encoding => @encoding,
+        :collation => @collation,
         :flags => Mysql2::Client::MULTI_STATEMENTS,
       })
   end
diff --git a/lib/fluent/plugin/out_mysql_bulk.rb b/lib/fluent/plugin/out_mysql_bulk.rb
index 78bc3b3..147d002 100644
--- a/lib/fluent/plugin/out_mysql_bulk.rb
+++ b/lib/fluent/plugin/out_mysql_bulk.rb
@@ -28,6 +28,10 @@ class MysqlBulkOutput < Output
                          desc: "SSL cipher."
     config_param :sslverify, :bool, default: nil,
                              desc: "SSL Verify Server Certificate."
+    config_param :encoding, :string, default: nil,
+                         desc: "Connection encoding."
+    config_param :collation, :string, default: nil,
+                         desc: "Connection collation."
 
     config_param :column_names, :string,
                  desc: "Bulk insert column."
@@ -142,6 +146,8 @@ def client(database)
           sslcapath: @sslcapath,
           sslcipher: @sslcipher,
           sslverify: @sslverify,
+          encoding: @encoding,
+          collation: @collation,
           flags: Mysql2::Client::MULTI_STATEMENTS
         )
     end