PURPOSE: To prevent a high-speed feeding operation member from being erroneously pressed in during dubbing with simple constitution by moving an erroneous operation inhibiting part to the position, where this inhibiting part inhibits the pressing-in operation of the high speed feeding operation member, in accordance with the pressing-in operation of a sound recording operation member.

CONSTITUTION: In the right end part of an erroneous operation preventing member 50, a slope 52 placed on the operating line of an engaging pin (an engaging part for interlocking) 32b of the second sound recording operation member 32 is provided as a part for interlocking which should be engaged with the engaging pin 32b; and in the left end part of the member 50, erroneous operation inhibiting parts 53 and 54 placed near the first fast forwarding operation member 9 and the first rewinding operation member 10 are formed and bent. When the second sound recording operation member 32 is pressed in, the erroneous operation preventing member 50 is moved right by slide contacting between the engaging pin 32b of the sound recording operation member 32 and the slope 52, and erroneous operation inhibiting parts 53 and 54 are placed in front of respective engaging pieces 9d and 10d of the first fast forwarding operation member 9 and the first rewinding operation member 10, thus inhibiting the pressing-in operation of the first fast forwarding operation member 9 as well as the first rewinding operation member 10.