Three-dimensional (3D) printer technology known as additive manufacturing pioneer make a breakthrough innovation in the manufacturing systems. One of the most important methods widely preferred at the additive manufacturing is a fused filament fabrication (FFF). Final products are manufactured via any thermoplastic material extruded by layer to layer at the FFF type printers used in many areas included at prototype manufacturing, academic studies, and for hobby purposes. In this study, fault tree analysis (FTA) was applied to examine the printing errors of FFF type 3D printers. Forty-nine basic events and four undeveloped events obtained from the FTA were shown in this study.