A continuous kneading apparatus, which suppresses heat release and deterioration of a material to be kneaded and has an improved apparatus life, is provided. It is a two-shaft kneading apparatus (1) having two screw sets (4) each furnished with a blade portion (7) on an outer surface of a rotating shaft (5), and a barrel (2) having a tubular chamber (3) having the two screw sets (4) disposed therein, and wherein a ratio h/D, where h is a clearance defined between a tip of the blade portion (7) and an inner wall surface of the chamber (3), and D is an inner diameter of the chamber (3), is 0.01 or higher.