diff --git a/header.go b/header.go
index 3aabbbe..2994a84 100644
--- a/header.go
+++ b/header.go
@@ -929,21 +929,53 @@ func (h *ResponseHeader) SetCookie(cookie *Cookie) {
 
 // SetCookie sets 'key: value' cookies.
 func (h *RequestHeader) SetCookie(key, value string) {
-	h.bufKV.key = append(h.bufKV.key[:0], key...)
-	h.SetCookieBytesK(h.bufKV.key, value)
+	h.parseRawHeaders()
+	h.collectCookies()
+	h.cookies = setArg(h.cookies, key, value)
 }
 
 // SetCookieBytesK sets 'key: value' cookies.
 func (h *RequestHeader) SetCookieBytesK(key []byte, value string) {
-	h.bufKV.value = append(h.bufKV.value[:0], value...)
-	h.SetCookieBytesKV(key, h.bufKV.value)
+	h.SetCookie(b2s(key), value)
 }
 
 // SetCookieBytesKV sets 'key: value' cookies.
 func (h *RequestHeader) SetCookieBytesKV(key, value []byte) {
+	h.SetCookie(b2s(key), b2s(value))
+}
+
+// DelCookie removes cookie under the given key.
+func (h *ResponseHeader) DelCookie(key string) {
+	h.cookies = delAllArgs(h.cookies, key)
+}
+
+// DelCookieBytes removes cookie under the given key.
+func (h *ResponseHeader) DelCookieBytes(key []byte) {
+	h.DelCookie(b2s(key))
+}
+
+// DelCookie removes cookie under the given key.
+func (h *RequestHeader) DelCookie(key string) {
 	h.parseRawHeaders()
 	h.collectCookies()
-	h.cookies = setArgBytes(h.cookies, key, value)
+	h.cookies = delAllArgs(h.cookies, key)
+}
+
+// DelCookieBytes removes cookie under the given key.
+func (h *RequestHeader) DelCookieBytes(key []byte) {
+	h.DelCookie(b2s(key))
+}
+
+// DelAllCookies removes all the cookies from response headers.
+func (h *ResponseHeader) DelAllCookies() {
+	h.cookies = h.cookies[:0]
+}
+
+// DelAllCookies removes all the cookies from request headers.
+func (h *RequestHeader) DelAllCookies() {
+	h.parseRawHeaders()
+	h.collectCookies()
+	h.cookies = h.cookies[:0]
 }
 
 // Add adds the given 'key: value' header.
diff --git a/header_test.go b/header_test.go
index a74b236..dcec5b6 100644
--- a/header_test.go
+++ b/header_test.go
@@ -1117,6 +1117,8 @@ func TestResponseHeaderCookie(t *testing.T) {
 		t.Fatalf("unexpected error: %s", err)
 	}
 
+	h.DelAllCookies()
+
 	var h1 ResponseHeader
 	br := bufio.NewReader(w)
 	if err := h1.Read(br); err != nil {
@@ -1131,6 +1133,14 @@ func TestResponseHeaderCookie(t *testing.T) {
 		t.Fatalf("unexpected cookie\n%v\nExpected\n%v\n", &c, &expectedC1)
 	}
 
+	h1.DelCookie("foobar")
+	if h.Cookie(&c) {
+		t.Fatalf("Unexpected cookie found: %v", &c)
+	}
+	if h1.Cookie(&c) {
+		t.Fatalf("Unexpected cookie found: %v", &c)
+	}
+
 	c.SetKey("йцук")
 	if !h1.Cookie(&c) {
 		t.Fatalf("cannot find cookie %q", c.Key())
@@ -1138,6 +1148,14 @@ func TestResponseHeaderCookie(t *testing.T) {
 	if !equalCookie(&expectedC2, &c) {
 		t.Fatalf("unexpected cookie\n%v\nExpected\n%v\n", &c, &expectedC2)
 	}
+
+	h1.DelCookie("йцук")
+	if h.Cookie(&c) {
+		t.Fatalf("Unexpected cookie found: %v", &c)
+	}
+	if h1.Cookie(&c) {
+		t.Fatalf("Unexpected cookie found: %v", &c)
+	}
 }
 
 func equalCookie(c1, c2 *Cookie) bool {
@@ -1192,9 +1210,25 @@ func TestRequestHeaderCookie(t *testing.T) {
 	if !bytes.Equal(h1.Cookie("foo"), h.Cookie("foo")) {
 		t.Fatalf("Unexpected cookie value %q. Exepcted %q", h1.Cookie("foo"), h.Cookie("foo"))
 	}
+	h1.DelCookie("foo")
+	if len(h1.Cookie("foo")) > 0 {
+		t.Fatalf("Unexpected cookie found: %q", h1.Cookie("foo"))
+	}
 	if !bytes.Equal(h1.Cookie("привет"), h.Cookie("привет")) {
 		t.Fatalf("Unexpected cookie value %q. Expected %q", h1.Cookie("привет"), h.Cookie("привет"))
 	}
+	h1.DelCookie("привет")
+	if len(h1.Cookie("привет")) > 0 {
+		t.Fatalf("Unexpected cookie found: %q", h1.Cookie("привет"))
+	}
+
+	h.DelAllCookies()
+	if len(h.Cookie("foo")) > 0 {
+		t.Fatalf("Unexpected cookie found: %q", h.Cookie("foo"))
+	}
+	if len(h.Cookie("привет")) > 0 {
+		t.Fatalf("Unexpected cookie found: %q", h.Cookie("привет"))
+	}
 }
 
 func TestRequestHeaderSetGet(t *testing.T) {