Organisers of The Choose Life Challenge Cup, which is to take place on Saturday at Gracemount Leisure Centre, say it aims to capitalise on the positive effects of people, especially men, to avoid the kind of isolation which can lead to suicide.
Sixteen five-a-side teams, including two women's squads, from across the Lothians are taking part.
It is being organised by John Murphy, a project worker at Health in Mind, and is timed to coincide with Suicide Prevention Week which runs September 7-13.
He said: "So many young men find it hard to talk about their feelings, and in 2013 there were 795 suicides recorded in Scotland, with the rate for men more than three times that of women.
"If there's someone you know who you think might be considering suicide, ask them and be willing to listen and encourage them to get help - you could help save their life.
"Alternatively, if you are feeling suicidal, don't hide it; find someone you trust and talk to them."