A display panel includes a bonded substrate which is bonded with a seal portion having an inlet portion, in which an inlet of a fluid is formed, a sealing material which seals the inlet, metal film patterns which are provided in an end portion of the bonded substrate, and external connection terminals which respectively have rectangular base portions and are provided in parallel in a transverse direction of the base portion. Each metal film pattern has a rectangular pattern base portion. The metal film patterns are provided in parallel such that the center position of the pattern base portion in the transverse direction is aligned with the center position of the base portion in the transverse direction. The width of the pattern base portion in the transverse direction is equal to or smaller than the width of the base portion in the transverse direction at the same arrangement position.