Bena Force was an ad hoc Australian Army formation that existed during World War II.

Established in early 1943 to defend the Bena Bena–Mount Hagen plateau south of the Ramu River in New Guinea and to prevent it from being occupied by the Imperial Japanese.

The force consisted of 57 men of the 2/7th Battalion led by Lieutenant Rooke.

Bena Force was also made responsible for the small Australian New Guinea Administrative Unit (ANGAU) detachment under Captain John Black, a detachment of the Royal Australian Air Force (RAAF) Rescue and Communication Flight and a special operations unit operating out of Bena Bena.

During June and July, observation posts were established in the region, patrols were sent out and infrastructure was built with the help of labour supplied by the ANGAU.