A bicycle comprising a braking system capable of executing an antilock braking control, and a front fork, the braking system comprising a hydraulic pressure control unit mounted on the bicycle, the hydraulic pressure control unit comprising: a base body in which an internal flow path through which brake liquid flows is formed; an inlet valve which is attached to the base body, is opened and closed when the antilock braking control is executed, and is driven by a first coil; an outlet valve which is attached to the base body, is opened and closed when the antilock braking control is executed, and is driven by a second coil; a coil casing in which the first coil and the second coil are accommodated; and a fixing member, wherein the fixing member is joined to the coil casing in a state where a columnar space with both ends opened is formed between a partial region of an outer surface of the coil casing and a partial region of an outer surface of the fixing member, or the fixing member is joined to the base body in a state where a columnar space with both ends opened is formed between a partial region of an outer surface of the base body and the partial region of the outer surface of the fixing member, characterized in that the hydraulic pressure control unit is joined to the front fork in a state where the front fork is positioned in the columnar space. a braking system capable of executing an antilock braking control, and a front fork, the braking system comprising a hydraulic pressure control unit mounted on the bicycle, the hydraulic pressure control unit comprising: a base body in which an internal flow path through which brake liquid flows is formed; an inlet valve which is attached to the base body, is opened and closed when the antilock braking control is executed, and is driven by a first coil; an outlet valve which is attached to the base body, is opened and closed when the antilock braking control is executed, and is driven by a second coil; a coil casing in which the first coil and the second coil are accommodated; and a fixing member, wherein the fixing member is joined to the coil casing in a state where a columnar space with both ends opened is formed between a partial region of an outer surface of the coil casing and a partial region of an outer surface of the fixing member, or the fixing member is joined to the base body in a state where a columnar space with both ends opened is formed between a partial region of an outer surface of the base body and the partial region of the outer surface of the fixing member, a base body in which an internal flow path through which brake liquid flows is formed; an inlet valve which is attached to the base body, is opened and closed when the antilock braking control is executed, and is driven by a first coil; an outlet valve which is attached to the base body, is opened and closed when the antilock braking control is executed, and is driven by a second coil; a coil casing in which the first coil and the second coil are accommodated; and a fixing member, wherein the fixing member is joined to the coil casing in a state where a columnar space with both ends opened is formed between a partial region of an outer surface of the coil casing and a partial region of an outer surface of the fixing member, or the fixing member is joined to the base body in a state where a columnar space with both ends opened is formed between a partial region of an outer surface of the base body and the partial region of the outer surface of the fixing member, characterized in that the hydraulic pressure control unit is joined to the front fork in a state where the front fork is positioned in the columnar space.