Button assembly

A button assembly, configured in a slot of a communication equipment, wherein the button assembly includes a button, a tray and at least an elastic arm, a side of the button is recessed inward to form a holding space, at least an inner side wall of the holding space is recessed to form a clamping groove, the tray is combined with the button, a side of the tray is protruded to form a base, the base is disposed in the holding space, the elastic arm is disposed on the tray, the elastic arm has a fixing portion, the fixing portion is mounted on a side wall of the tray, the fixing portion is extended frontward and is protruded outward to form a contact part, the contact part is extended frontward and outward to form a clamping part, the clamping part is arranged corresponding to the clamping groove, the clamping part is disposed in the clamping groove so that the button and the tray are fixed with each other, when the button assembly is configured in the slot, the contact part is push inward to make the clamping part disengaged from the clamping groove.