PURPOSE: To genuinely constitute a multivariable regulator with a mechanical system and to safely adjust fuel transfer to a pipe (end part-side) from a pipe through a stop bulb.

CONSTITUTION: A main body 2 which can three-dimensionally move and ball joints provided on points C, D and E at the corners of the main body 2 are provided. In the multivariable regulator 1, the position of the main body 2 can be controlled with the ball joints and a pneumatic converter 18, and mechanically linear transmission is realized from one point to the other points. Namely, the points C, D and E are connected to a control knob 22, the stop bulb 41 and a tentacle 21 and are connected to the converter 18.