A structure of an A/T (automatic transmission) control device for a vehicular transmission is disclosed in which when the shift lever (1) for controlling the A/T is pivoted at a position at which a positioning pin (7) is engaged with a parking range P, a solenoid pin (15a) pushed and rotates a rotary bush (14) supported on a peripheral surface of a rotary bush by means of a force of a spring within the solenoid (15) so that a recessed groove (14a) of the rotary bush (14) is deviated from a position of the positioning pin (7). Therefore, even if control button (13) (installed at an upper end of the shift lever (1)) is operated, the positioning pin (7) interferes with the upper plane of the rotary bush (14) and is not lowered any more. Consequently, no deviation from the range P occurs. Next, when a vehicular ignition switch (22) is turned to ON and foot brake is operated, the solenoid (15) is turned to ON. The solenoid pin (15a) pulls and rotates the rotary bush (14) against the spring force of the spring installed within the solenoid so that the position of the recessed groove (14) of the rotary bush becomes the same as the position of the positioning pin (7). When the control button (13) is operated, the positioning pin is moved out of the P range. Thus, it becomes possible to move the shift lever (1) at any one of the ranges other than the P range. The solenoid (15) is again turned to OFF a constant period of time after the solenoid is turned to ON with the foot brake is depressed.