The majority of concessionary travel card holders are pleased with the scheme.
A survey of 3,088 bus pass users found 98% were very or fairly happy with what they were receiving.
The research found that 51% thought having the travel card had improved their health, with more walking and getting out of the house cited as the main reasons.
Amongst disabled or visually impaired users, 77% said concessionary travel had helped improve or maintain their mental wellbeing.
Among those aged over 60, financial savings were cited as the most important benefit by 44% of respondents.
SNP MSP Adam Ingram said concessionary travel was threatened by the review of universally free benefits ordered by Scottish Labour leader Johann Lamont.
“This far-reaching survey of concessionary travel card holders underlines once again just how important this policy is,” he said.
“When Johann Lamont made her infamous cuts commission speech, she put the future of concessionary travel firmly in the firing line for Labour cuts.”