PURPOSE: To obtain an automatic device which is small-sized, inexpensive and suitable for mass production, by reversing the front and back of a holder together with a cassette.

CONSTITUTION: A tape is converted to a stop mode by an end detection signal. Subsequently, a motor 21 starts its forward turn, and a supporting device 5 is discharged to the right. When the discharge is completed, a press-contact pin 15a presses an operating piece 16a and slides, therefore, the motor 21 becomes a reverse turn state. When the motor 21 turns in reverse, the supporting device 5 is returned to the left, a press-contact pin 15b press-contacts with the operating piece 16a, the motor 21 is returned to its forward turn state. Also, a swtich 9 is pressed against the left end of the supporting device 5, is closed and is converted to a reproducing mode. In the process of 1 reciprocating motion of the supporting device 5, a holder 2 is semirotated together with a cassette 11 and the front and back is reversed, therefore, reproduction of another magnetic track is started.