A cassette tape recording and/or reproducing apparatus have a cassette holder including a cassette chamber and a cover plate for selectively opening and closing the cassette chamber. A pair of spindles for the support thereon of the reel hubs within the cassette have respective signal transmitting elements axially extending therethrough for transmitting to an associated switch a signal indicating that a corresponding one of the function control buttons has been manipulated. Each of these signal transmitting elements may be either an axially movable motion transmitting rod or a rod-shaped electric conductor. The corresponding function control buttons at least one for each spindle are provided on the cover plate at such positions as they align with the spindles when the cover plate is in the closed position.
