Hundreds of elderly people in Leicestershire and Rutland face being unable to get to day centres because of a shortage of drivers.
Voluntary and paid drivers who work for Age Concern provide a lifeline for isolated older people, particularly in rural areas.
Managers at the charity say they are facing a desperate shortage of drivers which could see some services end.
The buses are the only way many people can get to their day centres.
Adrian Wilkinson, transport manager said: "We're looking specifically for mature people who have possibly taken early retirement and have time on their hands in which to occupy that and put something back into the community.