diff --git a/types/rfc2047/index.d.ts b/types/rfc2047/index.d.ts
new file mode 100644
index 0000000000..224ec8bbd0
--- /dev/null
+++ b/types/rfc2047/index.d.ts
@@ -0,0 +1,18 @@
+// Type definitions for rfc2047 2.0
+// Project: https://github.com/One-com/rfc2047
+// Definitions by: Masanori Ohgita <https://github.com/mugifly>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/**
+ * Decode
+ * @param  {string} encodedText Encoded Text
+ * @return {string} Decoded Text
+ */
+export function decode(encodedText: string): string;
+
+/**
+ * Encode
+ * @param  {string} decodedText Decoded Text
+ * @return {string} Encoded Text
+ */
+export function encode(decodedText: string): string;
diff --git a/types/rfc2047/rfc2047-tests.ts b/types/rfc2047/rfc2047-tests.ts
new file mode 100644
index 0000000000..f795fe76b2
--- /dev/null
+++ b/types/rfc2047/rfc2047-tests.ts
@@ -0,0 +1,4 @@
+import * as rfc2047 from "rfc2047";
+
+rfc2047.decode(""); // $ExpectType string
+rfc2047.encode(""); // $ExpectType string
diff --git a/types/rfc2047/tsconfig.json b/types/rfc2047/tsconfig.json
new file mode 100644
index 0000000000..ddcd538656
--- /dev/null
+++ b/types/rfc2047/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "rfc2047-tests.ts"
+    ]
+}
diff --git a/types/rfc2047/tslint.json b/types/rfc2047/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/rfc2047/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }