Propulsion and steering device installed below sea level of outside of right and left shipwall in a ship

The present invention relates to a propulsion and steering device installed to the left and right outer walls of a warship or vessel below sea level. The propulsion and steering device includes a manifold installed to a lower portion of a ship body in a longitudinal direction and discharging water flowing to a stem side, to a stern side; a propulsion member configured to eject water in a lateral direction, of which a lower end is connected to an end portion of the manifold at the stern side to be able to rotate within a range of 360 degrees; and a steering member rotatably connected to an end portion of the propulsion member at the stern side, and rotating the propulsion member in any direction by a rotating force applied from the outside. The manifold has a main pipe disposed on a center line of a lower portion of the ship body at the stem side and opened to the stem side of the ship body to form a water inlet port, a left branched pipe branched from the main pipe and disposed along the left outer wall below sea level, a right branched pipe branched from the main pipe and disposed along the right outer wall below sea level, and a plurality of steering portions connected to the left and right branched pipes and disposed along the outer wall below sea level to eject the sea water flowing in the left and right branched pipes and thus convert the direction of the ship body.