Fuel cell and manufacturing method of fuel cell

A fuel cell, comprising:

• a cell stacked body provided by stacking a plurality of unit cells, the cell stacked body configured to include stacked body side faces arranged along a stacking direction of the plurality of unit cells;
• and
• a case configured to surround at least the stacked body side faces of the cell stacked body, wherein
• the case comprises:
• a first case configured to include a first case side wall and a pair of first opposed side walls that are arranged to rise from a circumference of the first case side wall such as to have a draft angle, the pair of first opposed side walls configured to be opposed to each other across the cell stacked body;
• and
• a second case configured to include a second case side wall that is opposed to the first case side wall across the cell stacked body, and a pair of second opposed side walls that are arranged to rise from a circumference of the second case side wall such as to have a draft angle, the pair of second opposed side walls configured to be opposed to each other across the cell stacked body, wherein
• a first edge of each of the first opposed side walls on an opposite side that is opposite to the first case side wall is joined with a second edge of each of the second opposed side walls on an opposite side that is opposite to the second case side wall.