A handy riveter device includes a fastening screw, a casing, a handlebar and a pulling member. The casing has a left cover and a right cover connecting to each other. The casing has a receiving space, an attaching face and a top face. A hole is opened on the casing and communicating with the receiving space. The pulling member is slidably assembled into the receiving space. The pulling member has an engaging groove and a resisting block. An elastomer abuts against the pulling member and the receiving space. The handlebar is assembled into the casing partially and a pivoting rod passes through the casing and the handlebar. Under this arrangement, a user assembles the fastening screw into an articles and the handle bar and sets the handy riveter device on the articles and pushes the handlebar to fasten the articles via the fastening screw.