THROTTLE DEVICE

Provided is a throttle device (10) including a total of two throttle units (11,12) in each two cylinders in an engine 1, each of the throttle units (11,12) having a unit body (23) having intake air passages (13a,13b,13c,13d) corresponding to four cylinders (2a,2b,2c,2d) of the engine (1), a throttle shaft (15) rotatably supported by the unit body (23), throttle valves (16a,16b,16c,16d) secured to the throttle shaft (15) to open and close the intake air passages (13a,13b,13c,13d) for the cylinders (2a,2b,2c,2d), a motor (17), and a deceleration mechanisms (20,45) decelerating rotation of a drive shaft (24) of the motor (17) and transmitting the decelerated rotation to the throttle shaft (15), in which a deceleration ratio of the deceleration mechanism (20) provided in a first throttle unit (11) and a deceleration ratio of the deceleration mechanism (45) provided in a second throttle unit (12) out of the two throttle units (11,12) are different from each other.