Provided is a three-dimensional modeling apparatus including: a drive motor; a screw that has a groove formation surface with a groove formed therein and that is rotated by the drive motor; a barrel that has a facing surface facing the groove formation surface and having a communication hole at the center thereof and a heater; and a nozzle that ejects a modeling material supplied from the communication hole, in which 0.03≤(Ss/Ls)/(Sn/Ln)≤5.00  (1) where Ss is an average sectional area that is an arithmetic mean between a maximum sectional area and a minimum sectional area of the groove, Ls is a length of the groove, Sn is a sectional area of the nozzle, and Ln is a length of the nozzle.