A self-releasable safety belt for a motorcycle or equivalent vehicles, having: a strap defined by a finite length including a first end and a second end; a retractor receiving the first end of said strap for stowing and locking the strap in a predetermined situation; a detachable joint coupling the first end of said strap to the rear of the motorcycle or the like, whereby the detachable joint will detach when force is applied to said joint; a male connector coupled to the second end of said strap; a female connector for receiving the male connector; a mounting device coupling the female connector to the rear of the motorcycle or the like; whereby said safety belt is extendable and retractable, but tightens up and holds the wearer in place when the motorcycle or the like comes to an abrupt halt or an impact, thereby preventing the wearer from being flung away; and whereby said safety belt is detachable, and disentangles the wearer when the motorcycle or the like falls from an upright position to the left or right side after the abrupt halt or impact, thereby preventing the wearer from being stuck in the motorcycle or the like which is still moving or knocked by the fallen motorcycle or the like when the rider lost control or balance after an abrupt halt or impact, characterised in that the female connector includes a pair of releasing devices disposed on opposite sides of said female connector; and a U-bracket is affixed on the mounting device and has two arms protruding towards the pair of releasing devices, whereby, the male connector is ejected from the female connector when the releasing devices contact the arms with force; whereby said safety belt is self-releasable. a strap defined by a finite length including a first end and a second end; a retractor receiving the first end of said strap for stowing and locking the strap in a predetermined situation; a detachable joint coupling the first end of said strap to the rear of the motorcycle or the like, whereby the detachable joint will detach when force is applied to said joint; a male connector coupled to the second end of said strap; a female connector for receiving the male connector; a mounting device coupling the female connector to the rear of the motorcycle or the like; whereby said safety belt is extendable and retractable, but tightens up and holds the wearer in place when the motorcycle or the like comes to an abrupt halt or an impact, thereby preventing the wearer from being flung away; and whereby said safety belt is detachable, and disentangles the wearer when the motorcycle or the like falls from an upright position to the left or right side after the abrupt halt or impact, thereby preventing the wearer from being stuck in the motorcycle or the like which is still moving or knocked by the fallen motorcycle or the like when the rider lost control or balance after an abrupt halt or impact, characterised in that the female connector includes a pair of releasing devices disposed on opposite sides of said female connector; and a U-bracket is affixed on the mounting device and has two arms protruding towards the pair of releasing devices, whereby, the male connector is ejected from the female connector when the releasing devices contact the arms with force; whereby said safety belt is self-releasable.