To provide a two-shaft screw pump capable of feeding a fed material without causing any trouble even if the viscosity of the fed material is high.

In this two-shaft screw pump 1, a pair of conveyor screws 17a and 17b on the same axes Xa and Xb as pump screws 7a and 7b are connected to the free ends 26 and 26 of the pair of pump screws 7a and 7b rotating in the meshed state of non-contact with each other. An inlet 18 is formed in a pump casing 2 at the upper positions of the pair of conveyor screws 17a and 17b so as to guide the fed material supplied from the inlet 18 to the pump screws 7a and 7b by drivingly rotating the pair of conveyor screws 17a and 17b. Agitating vanes 22a and 22b are installed on the shaft parts 8a and 8b of the pump screws 7a and 7b between a pump chamber 6 and a bearing part 5.