Abstract: A walker has a basket, a handle for use in pushing the walker along an upwardly facing surface and a plurality of legs connected to the basket and to the handle. The legs have lower ends, and a wheel and a braking element are associated with the lower end of each leg. A braking mechanism is provided for automatically actuating the braking elements and causing same to engage the upwardly facing surface if a predetermined weight is applied to the handle or to the basket, thus to stop the walker. The walker also has a manually operable brake system whereby the user can deliberately bring the walker to a stop.