To inexpensively manufacture a liquid inspection chip having high analytical precision.

In this liquid inspection chip, an opening part 10d corresponding to a flow passage is formed by laser work in the first member 10 provided with adhesive layers 10b, 10c having a self-adhesive property on both faces of a base material 10a. In the liquid inspection chip, planar support members 12, 13 are bonded to both upper and under faces of the adhesive layers 10b, 10c of the first member 10, using the self-adhesive property of the adhesive layers 10b, 10c of the first member 10, so as to form a flow passage 11 surrounded by a lower face of the support member 12, an upper face of the support member 13, and the opening part 10d. The liquid tightness is thereby high between the first member 10 and the support members 12, 13, and the precision of a cross-sectional area in the flow passage 11 is high because one-portions of the adhesive layers 10b, 10c are not protruded toward the flow passage or retracted therefrom.