An intake structure is provided for a V-type internal combustion engine having cylinders banked in a V pattern. A throttle body includes a throttle valve interposed in an intake passage extending to the inner side of the V banks and bent to be parallel to a crankshaft. The throttle body is provided with a bypass passage bypassing the throttle valve. An idle control valve for opening and closing the bypass passage by being moved in a direction orthogonal to the intake passage parallel to the crankshaft is added to the throttle body. A drive shaft for moving the idle control valve is projected from an electric actuator in the state of being directed in the moving direction of the idle control valve. The resulting configuration makes it possible to reduce the size of a throttle body and to suppress the overall width of the engine.