A foldable bench includes a first leg frame having a first cross bar, a second leg frame connected pivotally to and intersecting the first leg frame and having a second cross bar, a backrest frame connected pivotally to and extending upwardly and rearwardly from a top end of the second leg frame, left and right toggle mechanisms, each being stretchable to move the leg frames to an unfolded position and being foldable to permit the leg frames to move to a folded position, an upper frame connected to a top end of the first leg frame proximate to the first cross bar and to a top end of the backrest frame, a supporting rod having a bottom insert end releasable from the second cross bar, and a flexible seat cushion assembly mounted on the upper frame and the first cross bar.
