noun
massage machine
Refers to an electric or mechanical device that provides massage, such as a handheld massager or a massage chair.
肩こりがひどいので、あんま機を買った。
My stiff shoulders were so bad that I bought a massage machine.
Synonymous; マッサージ機 is a more direct loanword-based term, while 按摩機 uses the older Sino-Japanese word 按摩.
Compound of 按摩 (anma, 'massage') + 機 (ki, 'machine').