Abstract: A stretching exerciser includes an elongated base with an upright prop. The prop has a top end formed with a forwardly extending limiting projection. A seat member is mounted on the base. A connector includes a horizontal lever portion with a front end, a rear end which is mounted pivotally on the top end of the prop, and a bottom side which abuts against the limiting projection on the prop when the connector pivots forwardly. The connector further includes a vertical lever portion and a pair of curved connecting plates. A backrest member includes an elongated connecting frame unit with a bottom end that is mounted pivotally to the connecting plates. The frame unit is provided with a limit plate, and the connecting plates abut against the limit plate to limit rearward pivoting movement of the backrest member relative to the base.