This tower was built by Archbishop Richard Talbot or his successor Michael Tregury after the 1450s. As the name suggests it was used by the local constable of the area. As with much of the rest of the area the tower did not receive a large amount of maintenance. The constable's tower was restored between 1996 and 1998 when the castle was acquired by the county council. A new roof was added. There are two large chambers, next to which is a garderobe or medieval toilet. A chute would take the waste outside the north wall.