Abstract: A collapsible gym apparatus includes first and second pairs of support legs having upper ends pivotally secured to a transverse pivot shaft to define an A-frame support structure in set-up position. The first pair of support legs is pivotally secured at lower ends to a storage cabinet that receives the support legs in substantially flat, vertical, fold-up position. Exercising attachments, including a bench press bar, dip bars, adjustable weights, a chinning bar and the like, are provided on the first and second pairs of legs. The exercising attachments are capable of easy and rapid pivoting movement into substantially flat, fold-up position on the legs for upright storage with the support legs in the cabinet.