An apparatus for producing an easy-to-tear plastic film (1) comprising a pattern roll (10) rotatably supported by a pair of stationary frames (30), an anvil roll (20) moving along a pair of movable frames (40), a first driving unit (70) for rotating the movable frames (40), and second driving units (80) each mounted to the movable frame (40) to move the anvil roll (20) up and down; high-hardness, fine particles (10c) projecting from a rolling surface of the pattern roll (10) having such average height and maximum height as enabling the formation of unpenetrating fine pores in a plastic film; with the anvil roll (20) inclined to the pattern roll (10) in a horizontal plane by the operation of the first driving unit (70), large numbers of unpenetrating fine pores being formed transversely uniformly in the plastic film passing through a gap (G) of both rolls.