Provided is a clutch that is able to not only transmit torque smoothly even when an input shaft and an output shaft significantly differ in relative speed and phase, but also reduce an energy loss during torque transmission. The clutch (10) includes a dog clutch (40) for transmitting forward or reverse torque from the input shaft (11) to the output shaft (12), and a friction clutch (20) for transmitting torque from the input shaft (11) to the output shaft (12) and disposed in parallel with the dog clutch (40), and selectively transmits or interrupts torque between the input shaft (11) and the output shaft (12).