A shifter for an automatic transmission has a gate plate with a main gate and a sub-gate. A shift lever has a spherical portion and is movable along the main gate and the sub-gate. A switching member enables switching the automatic transmission to a manual operation. The switching member includes a body held in a swingable manner, and a lever holding section integrally formed with the body to rotatably hold the spherical portion. The body is adapted, to be uncoupled from the shift lever so as to place the automatic transmission in a manual mode when the shift lever is swung from the main gate into the sub-gate about the spherical portion and to be coupled to the shift lever so as to return the automatic transmission to an automatic mode when the shift lever is returned from the sub-gate to the main gate.