缝纫机，又称为裁缝机或缝衣机，有时也称为平车，粤语称衣车，台语多跟随日语称Mishin（ミシン）或称「针车」；是一种与纺织用的机器，可以将纺织品或者其他材质的物品用线缝在一起。

缝纫机在第一次工业革命期间发明，主要目的是减少制衣工厂手工缝纫的工作量。一般认为，缝纫机是在1790年由英国人Thomas Saint发明的。从那时起，缝纫机大大提高了纺织和制衣产业的生产效率。

在1950年代后期的中国，缝纫机成为所谓的四大件之一。

A sewing machine is a machine used to stitch fabric and other materials together with thread. Sewing machines were invented during the first Industrial Revolution to decrease the amount of manual sewing work performed in clothing companies. Since the invention of the first working sewing machine, generally considered to have been the work of Englishman Thomas Saint in 1790, the sewing machine has greatly improved the efficiency and productivity of the clothing industry.