A vehicle brake fluid pressure control device, comprising: - a base body provided with a brake fluid line (A1 - E2); - a housing in which a control board is accommodated; and - a cover that is attached to the housing and covers the control board, characterized in that: - the housing has an opening on a front side and an opening on a back side and has a peripheral wall part in which the control board is accommodated, - the peripheral wall part of the housing has an attachment part to which the cover is attached, - the cover has a protrusion extending toward the attachment part, - the attachment part of the peripheral wall part has a top groove that is filled with an adhesive and into which the protrusion is inserted, - the cover comes in contact with the attachment part at a contacting part present on an outer side of the protrusion when the cover is attached to the housing, - at least one of the top groove of the attachment part and a portion between the contacting part and the protrusion of the cover has a collecting groove in which an excess portion of the adhesive is collected when the cover is attached to the housing, - the housing has a flange that comes in contact with the base body, - the flange overhangs toward an outer side from a peripheral wall part of the housing, - the flange has a lower groove to be filled with an adhesive, - a surface of the flange close to the base body is divided by the lower groove into an outer-side surface on an outer side of the lower groove and an inner-side surface on an inner side of the lower groove, - a small gap is ensured between the inner-side surface and the base body when the outer-side surface comes in contact with the base body, and - an excess portion of the adhesive flows into the small gap. - a base body provided with a brake fluid line (A1 - E2); - a housing in which a control board is accommodated; and - a cover that is attached to the housing and covers the control board, - the housing has an opening on a front side and an opening on a back side and has a peripheral wall part in which the control board is accommodated, - the peripheral wall part of the housing has an attachment part to which the cover is attached, - the cover has a protrusion extending toward the attachment part, - the attachment part of the peripheral wall part has a top groove that is filled with an adhesive and into which the protrusion is inserted, - the cover comes in contact with the attachment part at a contacting part present on an outer side of the protrusion when the cover is attached to the housing, - at least one of the top groove of the attachment part and a portion between the contacting part and the protrusion of the cover has a collecting groove in which an excess portion of the adhesive is collected when the cover is attached to the housing, - the housing has a flange that comes in contact with the base body, - the flange overhangs toward an outer side from a peripheral wall part of the housing, - the flange has a lower groove to be filled with an adhesive, - a surface of the flange close to the base body is divided by the lower groove into an outer-side surface on an outer side of the lower groove and an inner-side surface on an inner side of the lower groove, - a small gap is ensured between the inner-side surface and the base body when the outer-side surface comes in contact with the base body, and - an excess portion of the adhesive flows into the small gap.