The propane tank storage cradle is a storage device that is designed to hold a propane tank in a horizontal position. The cradle forms a chamber into which the propane tank is laid. Accommodations are also provided with the propane tank storage cradle to receive the tank valve guard and the tank base. The dimensions of propane tank storage cradle are designed to prevent the propane tank from rolling and the cradle from flipping. The bottom of the propane tank storage cradle is fitted with non-skid feet which prevent the propane tank storage cradle from shifting during transport. The propane tank storage cradle comprises a first end cap, a second end cap, a third internal support and a fourth internal support.