This artical is a survey of hitherto unresearched Prątka Jednodniówka [ The Mayfly], a magazine edited by the patients of the TB sanatorium at Bystra Śląska near Bielsko-Biała and published in 1931–1935. Five issues of the magazine stored at the Cieszyn Library were examined for their literary content, made up almost exclusively by humor and satire. The gelotherapeutic profile makes the magazine unique among similar publications associated with healthcare institutions.