To perform turn-around with effective small turn and to attain high operability by attaining a structure having a water jet capable of injecting a jet stream to a rear side on both right and left wings respectively since needs relative to a submarine for performing underwater search have been increased accompanying with spreading of marine leisure in recent years.

The submarine 0100 includes the both right and left wings 0101A, B; and water jet propulsion parts 0102A, B provided on the both right and left wings and injecting the jet stream to a rear side respectively.