To easily improve the degrees of freedom in design of a hydraulic control valve body in a hydraulically controlled type automatic transmission.

In this hydraulically controlled automatic transmission 1, a driving mechanism 18 is arranged between a vertical wall face 13 of a torque converter housing 2 and a reaction housing 4, a hydraulic pump 19 inside a main housing 4 is driven by the driving mechanism 18, and an accumulator 30 for a control oil pressure passage to a multi-disk clutch 7 of a planetary gear mechanism 6 is separated from the hydraulic control valve body, attached to an outer surface of the main housing 9 for arranging it between the vertical wall face 13 of the torque converter housing 2 and the reaction housing 4 and inside the operation locus of an endless chain 16 in the driving mechanism 18.