A circuit board for body fluid collection includes a circuit board portion including an insulating layer and a conductor pattern which is supported by the insulating layer and in which an electrode, a terminal to be connected to a device for measuring the component of a body fluid, and a wire which electrically connects the electrode and the terminal are integrally provided. The circuit board for body fluid collection comprises a puncture needle for extracting the body fluid by performing puncturing, which is formed integrally with the circuit board portion and which is protruded from the circuit board portion, and a guard portion for guarding the tip of the puncture needle, which is arranged in opposition to the puncture needle in the lower flow side in the puncture direction of the puncture needle.
