Disclosed is a half moon type net for catching balls or flexibly stopping the flight of balls, comprising a half-moon-shaped or arch-shaped loop and a fabric retainer to better support the net structure, maintain a bigger net in shape, and reduce the chance of missing balls. More specifically, the net comprises: a main member forming a substantially half-moon-shaped closed loop; a base member forming a closed loop, wherein the straight front section of the base member is connected to the straight bottom section of the main member; a fabric retainer comprising two bottom sections formed adjacent to each of the two corners of the main member and an arch section along the top section of the main member so as to maintain the main member in shape; a fabric member covering the loop of the main member to flexibly stop the flight of projectiles; and a supporting member to sustain the main member against the base member while maintaining a substantial angle between the main and base members.