The organisation has launched the campaign to get the 140 seats for the cinema sponsored as the Covid-19 lockdown has put a stop to almost its entire programme of events, which it uses to generate income.
Actor and charity patron Matthew McNulty helped to get the fund-raising ball rolling with a video message of support, which can be seen on social media.
Leigh Film Society is hoping support from the public will help to get the cinema-building project across the finishing line.