Abstract: An improvement in the form of an attachment to a conventional shopping cart comprises a portable step, which is temporarily affixed to the cart in a position to be connected to the front or back of the shopping cart. The portable stair is secured to the top frame in the form of metal hooks. The attachment when fixed is off the ground allowing complete mobility of the cart. The stair becomes engaged when the weight of the user compresses the springs by stepping on the stair, thus securing the stair to the floor. When one stands upon the step, it allows one to reach articles on higher shelves. When compressed against the floor surface, it provides a stable step for the user. The rubber feet also provide a brake that will prevent movement of the cart while on is using the step attachment.