The magnetic properties of amorphous TbxFe1−x films prepared by rf cosputtering were studied. For 0.15<x<0.28, the films have uniaxial magnetic anisotropy normal to the film plane sufficient to stabilize cylindrical domains. The Curie temperature Tc and the coercivity Hc were measured as a function of composition. Tc increases monotonically with increasing Tb content in the alloy films in the region 0.1 < x<0.5. Hc is about one order of magnitude large, in contrast with amorphous Gd-Fe films at room temperature, and it increases further at low temperatures. Amorphous Tb-Fe films have a high potential for thermomagnetic recording using the Curie temperature because of the large Hc (1–5 kOe) and the low Curie temperature (∼120°C).