A multi-needle sewing machine including a plurality of needle bars including a specific needle bar allowing detachable attachment of a punch needle that punch engraves a surface of a punch workpiece in dot-by-dot strokes; a transfer mechanism that allows detachable attachment of a punch workpiece holder a detector that detects the attachment of the punch workpiece holder on the transfer mechanism; and a controller that when the attachment of the punch workpiece holder is detected by the detector, executes a punch engraving operation on the punch workpiece with the punch needle by selecting the specific needle bar and by controlling a needle-bar selector/driver mechanism and the transfer mechanism based on punch engraving pattern data which is pre-stored or given by external components.