To provide a sewing machine preventing waste fibers from being entangled with a thread catch means in a simple constitution and easily discharging the waste fibers downward falling from a needle hole.

This sewing machine M is provided with a punching needle 14 vertically movably disposed at a prescribed distance separated horizontally from a needle bar 30, a needle plate 12 having the needle hole for passing the punching needle 14, and a storage space 19 formed in the lower side of the needle hole of the needle plate 12 and allowing a part of the punching needle 14 to run therein, a holder part 17 detachably retaining a dust box 16 in the lower side of the needle plate 12 and a shielding wall part 17d shielding a shuttle mechanism 10 from the storage space 19 in the holer part 17.