The 4th Tank Battalion, 1st Division, King's Guard (Thai: กองพันทหารม้าที่ 4 กองพลที่ 1 รักษาพระองค์) (ม.พัน ๔ พล.๑ รอ.)

is a King's Guard Armoured Cavalry Battalion of the Royal Thai Army (RTA), it is currently a part of the 1st Division, King's Guard.

4th Tank Battalion, 1st Division, King's Guard was originally founded in 1930 from after a transformation of 2nd Tank Battalion in Saraburi.

4th Battalion was re-founded in 1973 into 2nd Tank Battalion with type M24 tanks from U.S. in Phra Nakhon province (Bangkok nowaday).

In 1979 the 4th Tank Battalion was appointed as King's Guard.