Abstract: An improved walker, wherein the improvement comprises:a. a tray having slidable supports removably mountable within brackets disposed on the rear legs of the walker, with said tray further having hooks engageable on a horizontal support rod of the walker for storage;b. a removably mountable seat whose two lateral edges each extend beyond and rest upon support rods, with said seat having lateral movement stops to prohibit seat movement during use, and with said seat further having hooks engageable on a horizontal support rod of the walker for mounting or for storage; andc. a back rest disposed behind and mounted to an upper support rod extending between the legs at the front of the walker.