A self-service terminal includes a first cabinet, a cover rotatably secured on the first cabinet, and an adjustment device received in the first cabinet. A card slot for inputting/outputting a cash card is defined in the cover, and a positioning member is attached to the user interface cover. The adjustment device includes a positioning tray and a mounting member slidably secured to the positioning tray. A reader is attached to the positioning tray and includes an interface. The mounting member includes a slanted side plate abutting the positioning tray; wherein the positioning member is engaged with the positioning tray, for aligning with the interface of the reader and the card slot of the cover.