Abstract: A single-action latch operates to hold a lid in assembled relationship to the receptacle of a medical case or other container. The latch includes an engaging member connected to the receptacle for pivoting movement between a latched position in which a hook portion of the engaging member extends up and over the top of the lid to hold the container in the closed condition, and an open position in which the hook portion is spaced from the lid so that the lid may be removed from the receptacle. An actuator assembled between the receptacle and the engaging member is mounted for pivoting movement between a first position in which the actuator locks the engaging member in the latched position, and a release position in which the actuator releases the engaging member for movement to the open position. The actuator is safely positioned behind the engaging member so as to prevent accidental or inadvertent release of the engaging member, but is readily accessible through the engaging member for actuation by a user.