A step stool comprising a first support to be disposed closer to a first end of a bed or bathtub； a second support to be disposed closer to a second end of the bed or bathtub； a step assembly supported between the first support and second support, the step assembly to enable the user to step thereon for assisting the user into and out of the bed or bathtub from a side, wherein the first support and second support define an unobstructed pathway for entry and exit with respect to the side and the step stool that is perpendicular with respect to the side whereby the user goes between the first support and second support to step onto and off of the step assembly without any obstruction； and folding mechanisms operably coupling the first support and second support to the step assembly to enable the step stool to be folded.
