<p>In a belt type continuously variable transmission system comprising: a fluid coupling device (50) for transmitting an output from an engine by use of fluid; a belt type continuously variable transmission device (100) for transmitting an output from the fluid coupling device at a continuously variable transmission gear ratio through a belt (190); an auxiliary transmission device (200) having a function of shifting an output from the belt type continuously variable transmission device in accordance with the forward-backward running conditions; a reduction gear device (300) for reducing an output from the auxiliary transmission device; an oil pump device (70) for feeding the hydraulic pressures to various hydraulic pressure components such as a valve body and the like; wherein the various devices are organically connected to one another while preventing the various devices from interfering with one another, whereby proper functions of the various devices are satisfactorily performed and the transmission system as a whole can be made simplified in construction and compact in size.</p>
