Abstract: An underwater air tacker (T) according to the present invention comprises: a water infiltration prevention means (1) which prevents water from infiltrating into a hammer operating means (100); an exhaust cover (2) preventing the water from flowing in; a compressed air discharge valve (3) preventing the water from flowing in; and a piston front-air discharge means (4). According to the underwater air tacker (T) having the above structure according to the present invention, when a marine collision accident occurs or a vessel faces a risk of sinking, a diver can rapidly repair a hole in the vessel underwater. Thus, damage caused by oil spill may be minimized, and loss of lives and property caused by the sinking of vessels can be prevented.

Abstract: An underwater air tacker (T) according to the present invention comprises: a water infiltration prevention means (1) which prevents water from infiltrating into a hammer operating means (100); an exhaust cover (2) preventing the water from flowing in; a compressed air discharge valve (3) preventing the water from flowing in; and a piston front-air discharge means (4). According to the underwater air tacker (T) having the above structure according to the present invention, when a marine collision accident occurs or a vessel faces a risk of sinking, a diver can rapidly repair a hole in the vessel underwater. Thus, damage caused by oil spill may be minimized, and loss of lives and property caused by the sinking of vessels can be prevented.