Abstract: A robot having an arm and an adapted actuating mechanism of a parallelogram construction, formed of vertical arms having the forward and rearward movement regulated within a fixed range, parallel rods having the up and down movement regulated within a fixed range, upper links and a forward horizontally extending horizontal arm is supported by side plates. At least the above mentioned vertical arms are provided with an X-axis driving device and the parallel rods are provided with a Z-axis driving device and means to balance the load of the work and arm mechanism.