Abstract: A molded plastic mouse or rat trap uses three separate molded pieces, namely a base, a striker and an actuator, which are releasably connected, in combination with metal springs for biasing the striker to a closed position. The components cooperate to provide a trap which is easier to operate. According to one embodiment, an extension spring is used to bias the trap to a closed position and in the set position, the spring force is primarily carried by the striker and base. Such an arrangement increases the sensitivity of the actuator, as only a small load is carried by the surfaces of the actuator and striker, maintaining the striker in the set position.