A brake fluid pressure control device for a vehicle, the device comprising: a base body; a plurality of reservoirs configured to store brake fluid and provided in the base body, wherein the reservoirs are disposed in parallel; and a single lid member secured to the base body, wherein each of the reservoirs has a reservoir hole, a piston that slides inside the reservoir hole, and a spring that biases the piston, wherein the lid member hermetically seals the plurality of reservoir holes, wherein the lid member comprises a plate member with which the springs make contact, and wherein the lid member further comprises a ring-shaped sealing member held between one face of the base body to which the plate member is secured and one face of the plate member opposed to the one face of the base body so as to provide a sealing function, and that, in the lid member, a screw hole formed in the plate member and configured to secure the plate member to the base body is disposed outside a region surrounded by the sealing member, and a communication passage communicating with the plurality of reservoir holes is provided inside the region surrounded by the sealing member, characterized in that the plate member is formed into a rectangular shape in a plan view and has a long-side rib formed by bending at least one of the long sides of the rectangular shape, and when the plate member is secured to the base body, the long-side rib is formed so as to cover at least part of one side face of the base body extending from the one face of the base body. a base body; a plurality of reservoirs configured to store brake fluid and provided in the base body, wherein the reservoirs are disposed in parallel; and a single lid member secured to the base body, wherein each of the reservoirs has a reservoir hole, a piston that slides inside the reservoir hole, and a spring that biases the piston, wherein the lid member hermetically seals the plurality of reservoir holes, wherein the lid member comprises a plate member with which the springs make contact, and wherein the lid member further comprises a ring-shaped sealing member held between one face of the base body to which the plate member is secured and one face of the plate member opposed to the one face of the base body so as to provide a sealing function, and that, in the lid member, a screw hole formed in the plate member and configured to secure the plate member to the base body is disposed outside a region surrounded by the sealing member, and a communication passage communicating with the plurality of reservoir holes is provided inside the region surrounded by the sealing member, a screw hole formed in the plate member and configured to secure the plate member to the base body is disposed outside a region surrounded by the sealing member, and a communication passage communicating with the plurality of reservoir holes is provided inside the region surrounded by the sealing member, characterized in that the plate member is formed into a rectangular shape in a plan view and has a long-side rib formed by bending at least one of the long sides of the rectangular shape, and when the plate member is secured to the base body, the long-side rib is formed so as to cover at least part of one side face of the base body extending from the one face of the base body.