Abstract: The present invention provides an electrophoretic analysis chip with which analysis of a sample can be performed with high accuracy in a short amount of time. The present invention includes a first reservoir (11) and a second reservoir (21) provided on a base material (10); a phoresis flow path (33) which connects the first reservoir with the second reservoir and enables phoresis of the sample; and a liquid level adjusting flow path (15) having a cross-sectional area greater than that of the phoresis now path, the liquid level adjusting flow path connecting the first reservoir with the second reservoir and enabling adjustment of a difference in level between a liquid held in the first reservoir and a liquid held in the second reservoir.