An electronic device comprising: an electrode layer (7a, 8a) and a support (9, 10) arranged in this order on each of both sides of an intermediate part including an electronic functional layer (5a, 5b) in the thickness direction of the electronic device; taking-out electrode parts (21, 21) from the electrode layers (7a 8a) are exposed in a plane region of at least one of the supports (9, 10); the electrode layers (7a, 8a) being adjacently arranged on both sides of the intermediate part in the thickness direction, wherein one of the electrode layers has a first contact portion which extends further than the other of the electrode layers in a first direction parallel to the plane region, and the other of the electrode layers has a second contact portion which extends further than the first of the electrode layers in a second direction parallel to the plane region, each of the supports (9, 10) having an inner surface adjacent to one of the electrode layers (7a, 8a), the taking-out electrode parts (20, 21) each include an electrode taking-out part (3, 4) exposed to the outside in a planar shape on one of the supports (9, 10) and each electrically connected to one of the electrode layers (7a, 8a), the electrode taking-out parts (3,4) being configured to allow electrical connection to an external power source, one of the taking-out electrode parts (20, 21) has a penetration structure (H1, H2) in which the one of the taking-out electrode parts (20, 21) penetrates and extends from an outer surface to at least the inner surface of a support (9, 10) and reaches said one of the electrode layers (7a, 8a) at said first contact portion while avoiding the other of the electrode layers (7a, 8a) and the other of the taking-out electrode parts (20, 21), and the other of the taking-out electrode parts (20, 21) has a penetration structure (H1, H2) in which the other of the taking-out electrode parts (20, 21) penetrates and extends from an outer surface to the inner surface of a support (9, 10) and reaches the other of the electrode layers (7a, 8a) at said second contact portion while avoiding the one of the electrode layers (7a, 8a) and the one of the taking-out electrode parts (20, 21). taking-out electrode parts (21, 21) from the electrode layers (7a 8a) are exposed in a plane region of at least one of the supports (9, 10); the electrode layers (7a, 8a) being adjacently arranged on both sides of the intermediate part in the thickness direction, wherein one of the electrode layers has a first contact portion which extends further than the other of the electrode layers in a first direction parallel to the plane region, and the other of the electrode layers has a second contact portion which extends further than the first of the electrode layers in a second direction parallel to the plane region, each of the supports (9, 10) having an inner surface adjacent to one of the electrode layers (7a, 8a), the taking-out electrode parts (20, 21) each include an electrode taking-out part (3, 4) exposed to the outside in a planar shape on one of the supports (9, 10) and each electrically connected to one of the electrode layers (7a, 8a), the electrode taking-out parts (3,4) being configured to allow electrical connection to an external power source, one of the taking-out electrode parts (20, 21) has a penetration structure (H1, H2) in which the one of the taking-out electrode parts (20, 21) penetrates and extends from an outer surface to at least the inner surface of a support (9, 10) and reaches said one of the electrode layers (7a, 8a) at said first contact portion while avoiding the other of the electrode layers (7a, 8a) and the other of the taking-out electrode parts (20, 21), and the other of the taking-out electrode parts (20, 21) has a penetration structure (H1, H2) in which the other of the taking-out electrode parts (20, 21) penetrates and extends from an outer surface to the inner surface of a support (9, 10) and reaches the other of the electrode layers (7a, 8a) at said second contact portion while avoiding the one of the electrode layers (7a, 8a) and the one of the taking-out electrode parts (20, 21).