PURPOSE: To prevent a malfunction by constituting a tape traveling direction switching mechanism of an oppressing piece which oppresses a swinging member to the first position direction by the rotation of a notched gear which is rotated after a lock state is released, when the swinging member is moved to the third position.

CONSTITUTION: Rotary levers 3a and 3b are respectively engaged with reel rotary gears 2a and 2b by the friction, and a rotation detecting member 5 is always unidirectionally deflected by the rotary level at a driven rotation side. A swinging member 7 pressure-welded to the member 5 in this deflected state, is allowed to horizontally swing between the first and second positions by a long hole 8 and a supporting shaft 9, and a rotation energizing force to the member 7 is erased when the tape reaches the terminal position. At that time, an operational frame 20 is engaged with an engaging part 12 of a cam hole 13, the member 7 is moved to the third position in order to operate the tape traveling direction switching mechanism and an oppressing piece 11 energizes the member 7 by the oppression so that the engaging part 12 can not be engaged with the frame 20 during this operation. Thus, the malfunction of the repeated operation of the tape traveling direction switching mechanism can be prevented.