In September 1980, Mance was transferred to Partizan in exchange for experienced striker Slobodan Santrač who moved in the opposite direction.

Mance made his league debut for Partizan on 22 November 1980 in a 1–1 home draw with Sarajevo, coming on as a second-half substitute.

He is arguably best remembered for scoring a spectacular long-range goal away at Queens Park Rangers in the first leg of the UEFA Cup second round.

He eventually played his last match on 1 September 1985, scoring the team's second goal from the penalty spot to give Partizan a 2–1 home league win over Budućnost Titograd.

[7] Mance died on 3 September 1985 in a car accident on the road while driving in his Peugeot 205 to the team's training session.