A sequencer is something that either generates a sequence or analyzes a sequence. The term may mean or refer to:

• Sequencer (album), a 1996 musical album by Covenant
• DNA sequencer, a machine used to automatically produce a sequence readout from a biological DNA sample
• Microsequencer, part of the control unit of a central processing unit (CPU)
• Music sequencer, software or hardware device for recording, playing, and editing digital music data
• Protein sequencer, a machine used to automatically produce a sequence readout from a biological protein sample

Sequencer | シーケンサー | Sekwencer