Abstract: A mode control device for a cassette tape recorder in which operational functions are combined with a small number of operational buttons or keys. A slidably-mounted electric source operation lever operates an electric source switch and also is slidable to a position causing the ejection of a tape cassette. A slidably-mounted function lever operates in conjunction with the electric source operation lever to change a tape drive between recording, stop, playback and rewinding modes with the function lever being prevented from operating during the OFF state of the electric source operation lever. When the electric source operation lever is at an ON position and the function lever is in a stop mode position, a magnetic recording and erase head and a pinch roller are in a position close to their respective contact positions so that the required manual force for moving to the recording or playback modes is quite small.