Accessory may refer to:
- Accessory (legal term), a person who assists a criminal
- Accessory (band), with members Dirk Steyer and Ivo Lottig
- Fashion accessory, i.e. an item used to complement a fashion or style
- Video game accessory, a piece of hardware used in conjunction with a video game console for playing video games
- Accessory bone
- Accessory nucleus, in anatomy, a cranial nerve nucleus
- Accessory nerve
- Accessory suite, a secondary dwelling on a parcel of land
- Rental accessories and attachments, accessories used in the rental industry
- Cable accessories for connecting and terminating cables
- Accessories (album), a compilation album from Dutch alternative rock band The Gathering