To reduce a number of parts and an assembling man-hour and to make a multiple electronic control throttle body provided with a vapor separator compact, a plurality of intake passages (2) provided in a horizontal direction are arranged in a vertical direction, a throttle valve shaft (3) constituted by one shaft penetrates the intake passages (2) in a vertical direction, a gear receiving chamber (6) receiving gears (10, 14) and a motor receiving chamber (5) receiving a motor (12) are formed in an upper end portion (1a) of the throttle body (1), a vapor separator (20) is arranged in the throttle body (1) below the motor receiving chamber (5), an axis (Y-Y) of an output shaft (12a) of the motor (12) and an axis (Z-Z) of a fuel pump (24) are arranged in parallel to an axis (X-X) of the throttle valve shaft (3).