Abstract: A transmission apparatus of a toy motorcycle, including a transmission mechanism, a transmission casing for enclosing the transmission mechanism, a lifting mechanism, a rearward pushing mechanism and a laterally pushing mechanism. The transmission casing is mounted on a chassis of a housing of the toy motorcycle. The transmission mechanism includes a power source, a reducing gear set driven by the power source and respectively to a driving shaft and driven shaft, and a set of concentrical cams. The transmission mechanism drives a rotary power wheel set which enables the toy motorcycle to run on the ground. The set of cams drive the lifting mechanism, rearward pushing mechanism and laterally pushing mechanism to pivotally open a rear cover and two lateral covers for showing several decorative bodies such as toy helicopter and missiles as well as lifting and rotating the entire toy motorcycle.