This syringe barrel (18) for a pre-filled syringe (10) is equipped with a hollow body (24), a base-end opening (26) that is provided to the base end of the body (24), and a distal-end nozzle (28) that is provided to the distal end of the body (24). The body (24) is formed from a cyclic olefin polymer or a cyclic olefin copolymer. The body (24) has a thick body section (24b) that accounts for at least 80% of the body (24) in the axial direction. The thickness (T) of the thick body section (24b) is from 2.23 to 2.40 mm.