Power storage device

A power storage device comprising:

• a device body having first and second principal surfaces extending along a length direction and a width direction, first and second side surfaces extending along the length direction and a thickness direction, and first and second end surfaces extending along the width direction and the thickness direction, the device body comprising:
• a first internal electrode which has a first current collector and a first polarizable electrode layer on at least one surface of the first current collector and the first current collector extends to the first end surface,
• a second internal electrode which has a second current collector and a second polarizable electrode layer on at least one surface of the second current collector and the second current collector extends to the second end surface,
• an electrolyte-containing layer between the first polarizable electrode layer and the second polarizable electrode layer, and
• an insulating adhesive portion adhered to the first current collector and the second current collector and extending around the first and second polarizable electrode layers and the electrolyte-containing layer, wherein
• a thickness of the insulating adhesive portion is larger than a sum of thicknesses of the first and second polarizable electrode layers and the electrolyte-containing layer.