Seatbelt device of vehicle

A seatbelt device of a vehicle comprising:

• a webbing reel around which a webbing is rolled up;
• a motor which is driven to rotate the webbing reel;
• an acceleration detection unit detecting an acceleration applying to the vehicle;
• an electric current control unit controlling a driving current of the motor;
• and
• an acceleration condition determination unit determining, based on a detection signal of the acceleration detection unit, whether or not an acceleration greater than or equal to a set value has been applied to the vehicle within a predetermined amount of time after an acceleration greater than or equal to a first threshold acceleration value has been applied to the vehicle, wherein
• when the acceleration condition determination unit determines that an acceleration greater than or equal to the set value has been applied to the vehicle within the predetermined amount of time, the electric current control unit controls the driving current of the motor so that a set amount of the webbing is wrapped up,
• when the acceleration condition determination unit determines that an acceleration greater than or equal to the set value has not been applied to the vehicle within the predetermined amount of time, the electric current control unit controls the driving current of the motor according to a movement of an upper body of a passenger, and
• the set value is less than the first threshold acceleration value.