Abstract: Proposed in this application is a device for adjusting ignition timing in an engine for a motor-cycle having an engine, an ignition circuit for the engine, a fluid coupling connected to the engine, a power transmission mechanism which receives driving force from the fluid coupling, and shift indicating switch which changes over in association with the power transmission mechanism to indicate a low speed drive, a high speed drive, or the neutral position, wherein the ignition timing adjusting device comprises: a plurality of ignition signal emitters, each having differing signal emission timing and producing an ignition signal output to actuate said ignition circuit when the engine is in a driven state and the vehicle is in a stopped state; and a switching element which, in accordance with change-over operation of the shift indicating switch device, controls in such a manner that any one of the output signals from the plurality of ignition signal emitters may be fed as an input into the ignition circuit.