Insulator

Abstract

To provide an insulator capable of improving manufacturability and rigidity. [Solution] The insulator 16 is provided on the fuel cell stack 1. The fuel cell stack 1 comprises a cell stack 10 formed by stacking a plurality of power generation cells 12 having an electrolyte membrane / electrode structure 20 and separators 24, 26, a terminal plate 15 provided at the end of the cell stack 10 in the stacking direction, an insulator 16, and an end plate 17. The terminal plate 15, the insulator 16, and the end plate 17 are provided in that order from the cell stack 10 side in the stacking direction, and the insulator 16 has a main body 60, a first rib 61 erected from the first surface 6a of the main body 60 facing the terminal plate 15, and a second rib 62 erected from the second surface 6b of the main body 60 facing the end plate 17.

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