A microchemical chip (10A) comprises a plate-shaped substrate (12), with a channel (14) formed on a surface of the substrate (12) through which a fluid flows. A fluid storage section (16) for storing the fluid communicates with the channel (14) at a starting end of the channel (14). A fluid discharge section (18) communicates with the channel (14) at a terminal end of the channel (14). An extruding pump section (22) is formed integrally on the substrate (12), at a portion of the channel (14) in the vicinity of the fluid storage section (16).