The utility model discloses a self -service device, self -service device is including going out paper mouth and paper out mechanism, go out the paper mouth with paper out mechanism pegs graft. The utility model provides a self -service device is including the play paper mouth and the paper out mechanism that peg graft, wherein, it pegs graft with paper out mechanism to go out the paper mouth, it is fixed through the grafting between a paper mouth and the paper out mechanism, the messenger draws the paper mouth and adjusts well at medium direction of height and medium width direction with paper out mechanism, there are not the gap in play paper mouth and paper out mechanism after the grafting is adjusted well in the medium transport direction, make the medium junction through going out paper mouth and paper out mechanism smoothly, it is smooth and easy to go out paper, the card paper phenomenon can not appear, high reliability.