A vehicle comprising: a fuel cell that receives supply of fuel gas and generates electric power; a motor that is driven by a generated electric power of the fuel cell; an electric power consuming auxiliary machine that consumes electric power to be driven; a mechanical brake that generates a vehicle braking force corresponding to depression of a brake pedal; and a secondary cell that is capable of being charged and discharged; characterized by: assisting a regenerative braking force to be obtained by a regenerative control of the motor with the vehicle braking force by the mechanical brake during a vehicle deceleration in a situation without the depression of the brake pedal; wherein: the deceleration control unit is configured to, when performing the vehicle deceleration in the situation without the depression of the brake pedal, calculate a deceleration force necessary for the vehicle deceleration while being separated into the regenerative braking force of the drive motor and the vehicle braking force of the mechanical brake; the deceleration control unit is configured to set the regenerative braking force to be obtained by the regenerative control to an upper limit regenerative braking force corresponding to the maximum electric power that the electric power consuming auxiliary machine is capable of consuming; when the electric power consuming auxiliary machine is capable of consuming said maximum electric power, the regenerative electric power associated with regenerative braking is consumed by the electric power consuming auxiliary machine and consumption of the regenerative electric power by the charge of the secondary cell is avoided; and when the electric power consuming auxiliary machine is incapable of consuming the regenerative electric power to the maximum electric power, the secondary cell consumes the residual regenerative electric power by charge. a fuel cell that receives supply of fuel gas and generates electric power; a motor that is driven by a generated electric power of the fuel cell; an electric power consuming auxiliary machine that consumes electric power to be driven; a mechanical brake that generates a vehicle braking force corresponding to depression of a brake pedal; and a secondary cell that is capable of being charged and discharged; characterized by: assisting a regenerative braking force to be obtained by a regenerative control of the motor with the vehicle braking force by the mechanical brake during a vehicle deceleration in a situation without the depression of the brake pedal; wherein: the deceleration control unit is configured to, when performing the vehicle deceleration in the situation without the depression of the brake pedal, calculate a deceleration force necessary for the vehicle deceleration while being separated into the regenerative braking force of the drive motor and the vehicle braking force of the mechanical brake; the deceleration control unit is configured to set the regenerative braking force to be obtained by the regenerative control to an upper limit regenerative braking force corresponding to the maximum electric power that the electric power consuming auxiliary machine is capable of consuming; when the electric power consuming auxiliary machine is capable of consuming said maximum electric power, the regenerative electric power associated with regenerative braking is consumed by the electric power consuming auxiliary machine and consumption of the regenerative electric power by the charge of the secondary cell is avoided; and when the electric power consuming auxiliary machine is incapable of consuming the regenerative electric power to the maximum electric power, the secondary cell consumes the residual regenerative electric power by charge. the deceleration control unit is configured to, when performing the vehicle deceleration in the situation without the depression of the brake pedal, calculate a deceleration force necessary for the vehicle deceleration while being separated into the regenerative braking force of the drive motor and the vehicle braking force of the mechanical brake; the deceleration control unit is configured to set the regenerative braking force to be obtained by the regenerative control to an upper limit regenerative braking force corresponding to the maximum electric power that the electric power consuming auxiliary machine is capable of consuming; when the electric power consuming auxiliary machine is capable of consuming said maximum electric power, the regenerative electric power associated with regenerative braking is consumed by the electric power consuming auxiliary machine and consumption of the regenerative electric power by the charge of the secondary cell is avoided; and when the electric power consuming auxiliary machine is incapable of consuming the regenerative electric power to the maximum electric power, the secondary cell consumes the residual regenerative electric power by charge.