A brake device for a straddled vehicle having a front wheel and a rear wheel, the brake device comprising: a first brake configured to exert a braking force on the front wheel by a hydraulic pressure; a second brake configured to exert a braking force on the rear wheel by a hydraulic pressure; an operation member (54, 54a) configured to be operated by a driver in order to adjust the braking forces of the first and second brakes (51, 52); an operation amount detector configured to detect an operation amount of the operation member (54, 54a); a storage configured to store a relationship between an operation amount of the operation member (54, 54a) and braking forces to be respectively exerted on the front wheel and the rear wheel; a hydraulic pressure control device configured to perform hydraulic pressure control to acquire, from the relationship stored in the storage based on the operation amount detected by the operation amount detector, a braking force to be exerted on the front wheel as a first target braking force and a braking force to be exerted on the rear wheel as a second target braking force, to supply a hydraulic pressure corresponding to the acquired first target braking force to the first brake, and to supply a hydraulic pressure corresponding to the acquired second target braking force to the second brake; characterised in that the operation member comprises a single operation member (54, 54a), and a hydraulic pressure generation device is configured to respectively supply hydraulic pressures corresponding to the operation amount of the single operation member (54, 54a) to the first brake and the second brake during a non-operation of the hydraulic pressure control of the hydraulic pressure control device, wherein the hydraulic pressure control device is configured to perform the hydraulic pressure control such that a relationship between an operation amount of the single operation member (54, 54a) and a total of the braking forces exerted on the front wheel and on the rear wheel during an operation of the hydraulic pressure control is equal to a relationship between an operation amount of the single operation member (54, 54a) and a total of the braking forces exerted on the front wheel and on the rear wheel during the non-operation of the hydraulic pressure control. a first brake configured to exert a braking force on the front wheel by a hydraulic pressure; a second brake configured to exert a braking force on the rear wheel by a hydraulic pressure; an operation member (54, 54a) configured to be operated by a driver in order to adjust the braking forces of the first and second brakes (51, 52); an operation amount detector configured to detect an operation amount of the operation member (54, 54a); a storage configured to store a relationship between an operation amount of the operation member (54, 54a) and braking forces to be respectively exerted on the front wheel and the rear wheel; a hydraulic pressure control device configured to perform hydraulic pressure control to acquire, from the relationship stored in the storage based on the operation amount detected by the operation amount detector, a braking force to be exerted on the front wheel as a first target braking force and a braking force to be exerted on the rear wheel as a second target braking force, to supply a hydraulic pressure corresponding to the acquired first target braking force to the first brake, and to supply a hydraulic pressure corresponding to the acquired second target braking force to the second brake;