Printed circuit board and fuel cell

An FPC board (1) includes a base insulating layer (2). The base insulating layer (2) is composed of a first insulating portion (2a) and a second insulating portion (2b). A bend portion (B1) is provided in the first insulating portion. A conductor layer (3) is formed on one surface of the base insulating layer (2). The conductor layer (3) is composed of a collector portion (3a,3b) and a drawn-out conductor portion (4a,4b). A cover layer (6a,6b) is formed to cover the conductor layer (3). A liquid crystal polymer is used as a material for the base insulating layer (2).