A bicycle comprising: a hydraulic brake system, the hydraulic brake system including a master cylinder, a wheel cylinder of a front-wheel braking section, a brake fluid pipe, and a hydraulic pressure controller for controlling hydraulic pressure of a brake fluid that is at least supplied to the wheel cylinder, the hydraulic pressure controller being connected with the master cylinder via the brake fluid pipe and to the wheel cylinder via a further fluid pipe, and comprising: a base section that is formed with a channel (112A-D), through which the brake fluid flows, therein; a valve (113A, 113B) that is attached to the base section and opens and closes the channel (112A-D); and a coupling section that couples the base section to a turning section of the bicycle, wherein the turning section turns about an axis of a head tube of the bicycle, wherein the turning section includes: an upper turning section that turns on an upper side of the head tube; and a lower turning section that turns on a lower side of the head tube, wherein the upper turning section includes: an upper projected section of a steering column that is axially supported by the head tube, the upper projected section being projected to the upper side of the head tube; a handle stem that is held by the upper projected section; and a handlebar that is held by the handle stem, wherein the coupling section is coupled to the upper turning section, and characterized in that at least one part of the base section is located between the handle stem and a front wheel of the bicycle, and the at least one part of the base section is located at a rear side relative to the forward end of the handle stem. a hydraulic brake system, the hydraulic brake system including a master cylinder, a wheel cylinder of a front-wheel braking section, a brake fluid pipe, and a hydraulic pressure controller for controlling hydraulic pressure of a brake fluid that is at least supplied to the wheel cylinder, the hydraulic pressure controller being connected with the master cylinder via the brake fluid pipe and to the wheel cylinder via a further fluid pipe, and comprising: a base section that is formed with a channel (112A-D), through which the brake fluid flows, therein; a valve (113A, 113B) that is attached to the base section and opens and closes the channel (112A-D); and a coupling section that couples the base section to a turning section of the bicycle, wherein the turning section turns about an axis of a head tube of the bicycle, wherein the turning section includes: an upper turning section that turns on an upper side of the head tube; and a lower turning section that turns on a lower side of the head tube, wherein the upper turning section includes: an upper projected section of a steering column that is axially supported by the head tube, the upper projected section being projected to the upper side of the head tube; a handle stem that is held by the upper projected section; and a handlebar that is held by the handle stem, wherein the coupling section is coupled to the upper turning section, and characterized in that at least one part of the base section is located between the handle stem and a front wheel of the bicycle, and the at least one part of the base section is located at a rear side relative to the forward end of the handle stem. an upper turning section that turns on an upper side of the head tube; and a lower turning section that turns on a lower side of the head tube, wherein the upper turning section includes: an upper projected section of a steering column that is axially supported by the head tube, the upper projected section being projected to the upper side of the head tube; a handle stem that is held by the upper projected section; and a handlebar that is held by the handle stem, wherein the coupling section is coupled to the upper turning section, and characterized in that at least one part of the base section is located between the handle stem and a front wheel of the bicycle, and the at least one part of the base section is located at a rear side relative to the forward end of the handle stem. an upper projected section of a steering column that is axially supported by the head tube, the upper projected section being projected to the upper side of the head tube; a handle stem that is held by the upper projected section; and a handlebar that is held by the handle stem, wherein the coupling section is coupled to the upper turning section, and characterized in that at least one part of the base section is located between the handle stem and a front wheel of the bicycle, and the at least one part of the base section is located at a rear side relative to the forward end of the handle stem.