A gutta-percha remover suitable for removing gutta-percha and having flexibility with good compliancy to curvature of a root canal and superior removing capability for forming a sufficient gap between the gutta-percha and the root canal wall is provided.A gutta-percha remover (10) includes a shaft (12), a tapered working portion (13) connected to the shaft (12), and one, two, or more screw-shaped grooves (14) formed in the working portion, wherein as to cross sections (13a, 13b) of a base end and a tip of the working portion, the tip of the working portion (13) is greater in rate of the area of each cross-section to corresponding circle (13a3, 13b3) circumscribing said each cross section.