A pump equipment including a pair of pump units (22, 23), each pump unit including a swash plate type piston pump and a capacity changing mechanism (25, 26) configured to incline a swash plate of the swash plate type piston pump to change a pump capacity, the pump equipment comprising: a valve unit sandwiched between said pair of pump units (22, 23) and coupled to the pair of pump units (22, 23); and hydraulic regulators (111, 112), each including a servo switching valve and a power control piston and being respectively coupled to the pair of pump units (22, 23), the servo switching valve including a spool and a sleeve and controlling a supply status of a mechanism driving fluid supplied to the capacity changing mechanism (25, 26), the power control piston being disposed to displace the spool of the servo switching valve in accordance with the pressure of hydraulic oil discharged from the first or second pump unit and the pressure of the power control piston driving oil supplied thereto, the control piston driving oil corresponding to a hydraulic signal, wherein: an inter-pump passage including pump passages (118, 119) respectively formed at said pair of pump units (22, 23) and a valve passage formed at a valve block of the valve unit is formed to extend between said pair of pump units (22, 23); and the inter-pump passage opens at upper end portions (47, 48) of the pair of pump units (22, 23) toward the hydraulic regulators (111, 112), and the power control pistons of said pair of pump units (22, 23) communicate with each other through the inter-pump passage which is used to direct the supplied power control piston driving oil from the first hydraulic regulator to the second hydraulic regulator. a valve unit sandwiched between said pair of pump units (22, 23) and coupled to the pair of pump units (22, 23); and hydraulic regulators (111, 112), each including a servo switching valve and a power control piston and being respectively coupled to the pair of pump units (22, 23), the servo switching valve including a spool and a sleeve and controlling a supply status of a mechanism driving fluid supplied to the capacity changing mechanism (25, 26), the power control piston being disposed to displace the spool of the servo switching valve in accordance with the pressure of hydraulic oil discharged from the first or second pump unit and the pressure of the power control piston driving oil supplied thereto, the control piston driving oil corresponding to a hydraulic signal, wherein: an inter-pump passage including pump passages (118, 119) respectively formed at said pair of pump units (22, 23) and a valve passage formed at a valve block of the valve unit is formed to extend between said pair of pump units (22, 23); and the inter-pump passage opens at upper end portions (47, 48) of the pair of pump units (22, 23) toward the hydraulic regulators (111, 112), and the power control pistons of said pair of pump units (22, 23) communicate with each other through the inter-pump passage which is used to direct the supplied power control piston driving oil from the first hydraulic regulator to the second hydraulic regulator. an inter-pump passage including pump passages (118, 119) respectively formed at said pair of pump units (22, 23) and a valve passage formed at a valve block of the valve unit is formed to extend between said pair of pump units (22, 23); and the inter-pump passage opens at upper end portions (47, 48) of the pair of pump units (22, 23) toward the hydraulic regulators (111, 112), and the power control pistons of said pair of pump units (22, 23) communicate with each other through the inter-pump passage which is used to direct the supplied power control piston driving oil from the first hydraulic regulator to the second hydraulic regulator.