A push-button switch assembly with identification of switching states includes: a push-button switch having an actuating head for actuating the push-button switch and having a push-button guide; and an adapter device for attaching the push-button switch to a housing body. The adapter device fastens the push-button switch in a bore of the housing body. The adapter device compensates for a different diameter of the bore of the housing body and the push-button guide. The push-button guide has a plunger which is arranged in a hollow body of the push-button guide and movable in the hollow body of the push-button guide when the actuating head is actuated. By actuating the actuating head, the push-button switch is switchable from a non-released state to a released state. The push-button switch is arranged such that a region thereof visibly protrudes from under the actuating head when the push-button switch is in the non-released state.