A sheet sticking apparatus includes a feeder configured to feed an adhesive sheet, a folding unit configured to fold the fed adhesive sheet, and an attaching unit configured to press the folded adhesive sheet onto an adherend to stick the adhesive sheet to the adherend. The adhesive sheet includes a first sheet and a second sheet having a feeding-direction leading end temporarily attached to a feeding-direction rear end of the first sheet. The folding unit includes a deflecting section configured to deflect the second sheet into a reverse V-shape.