Abstract: An actuator for a rotating frame animal trap having two similar frames pivotally connected to each other. The actuator comprises two arms spring biased at one end and each terminating in a ring at the other. The rings have the dimensions so that the actuator can be mounted on the trap to encircle adjacent ends of both frames of the trap. On release of the trap, the actuator can rapidly and forcefully effect a rotation of the trap to its closed position. A rigid joint is formed in one arm of the actuator. The joint is breakable to separate the one arm by application of a force to the spring biased end of the actuator. The actuator does not affect the position of the set trap and is simple in construction.