Abiezer or Abieezer or Abi-ezer is the name of three Biblical characters. The name means "father of help" i.e., helpful. The characters are:
- The prince of the tribe of Dan at the time of the Exodus ().
- The second of the three sons of Hammoleketh, the sister of Gilead (also called Jeezer ()). He was the grandson of Manasseh (). From his family Gideon sprang (; and ). In , Gideon describes his clan, the Abiezrites, as "the weakest in [the tribe of] Manasseh" .
- One of King David's thirty warriors (; ) a Benjamite from Anathoth.