A brake fluid pressure control unit for a vehicle, the unit comprising: a hydraulic block that includes a housing containing an internal channel (9_1) for a first system and an internal channel (9_2) for a second system by which incorporated pumps (25_1, 25_2) and corresponding external pressurizing sources (22_1, 22_2) are allowed to individually communicate with a wheel cylinder (23_1) for a first wheel and a wheel cylinder (23_2) for a second wheel, respectively, via corresponding pressure increase valves (27_1, 27_2), and also containing a detected hydraulic pressure inlet hole leading to a pressure receiving part of a pressure sensor, wherein the housing has, in one end face thereof, pressure increase valve accommodating holes (2_1, 2_2), pressure reduction valve accommodating holes (3_1, 3_2), and a pressure sensor accommodating hole, and has, in both side faces thereof, two opposite pump accommodating holes (5_1, 5_2), wherein the housing also has, in a lower face thereof, reservoir installation holes (6_1, 6_2) that take in corresponding brake fluids discharged from the corresponding wheel cylinders via the corresponding pressure reduction valves and that supply the brake fluids to the corresponding pumps, and has, in an upper face thereof, pressurizing source ports (7_1, 7_2) that connect to the corresponding external pressurizing sources, and wheel cylinder ports (8_1, 8_2) that individually connect to the corresponding wheel cylinders (23_1, 23_2) for the first wheel and the second wheel respectively, wherein the first hole (9a_1) and the second hole (9a_2) are provided opposite each other in both side faces of the housing, and wherein a motor terminal hole through which a motor terminal is extended from an electronic control unit, which is attached to one face of the housing, to a motor for driving the pumps, which is attached to the other face thereof, extends from the one face to the other of the housing in a horizontal direction, characterized in that the detected hydraulic pressure inlet hole meets either a first hole (9a_1) composing part of the internal channel (9_1) for the first system or a second hole (9a_2) composing part of the internal channel (9_2) for the second system, and is disposed on a line extending from the other of the first or second hole, thereby connecting only one of the first hole (9a_1) and the second hole (9a_2) to the detected hydraulic pressure inlet hole, and in that the detected hydraulic pressure inlet hole is disposed so as to meet either the first hole (9a_1) or the second hole (9a_2) and vertically cross the line extending from the other of the first or second hole, and wherein the internal channel (9_1) for the first system and the internal channel (9_2) for the second system are each composed of corresponding holes connecting the following three: the corresponding pressure increase valve, the corresponding pressure reduction valve, and the corresponding wheel cylinder port (8_1, 8_2), and in that the motor terminal hole is disposed opposite the side where the detected hydraulic pressure inlet hole, the first hole (9a_1), and the second hole (9a_2) are located using the pressure sensor accommodating hole as a position reference, when viewed from the axial direction of the pressure sensor accommodating hole.