Power storage sheet and battery

The present invention provides a power storage sheet that exhibits superior reliability. This power storage sheet is provided with a first conductive sheet 20, a second conductive sheet 30, and a plurality of all-solid-state power storage elements 10. The second conductive sheet 30 is disposed so as to face the first conductive sheet 20. The plurality of all-solid-state power storage elements 10 are arranged between the first conductive sheet 20 and the second conductive sheet 30 so as to be apart from each other at a certain interval at least in one direction. Each of the all-solid-state power storage elements 10 has an all-solid-state electrolyte layer 11, a first electrode 12, and a second electrode 13. The first electrode 12 is electrically connected to a conductive main surface of the first conductive sheet 20. The second electrode 13 is electrically connected to a conductive main surface of the second conductive sheet 30.