An electronic device has a sealing part 90, an electronic element 95 provided in the sealing part 90 and a connection body 50 having a head part 40 connected to a front surface of the electronic element 95 via a conductive adhesive 75. The head part 40 has a second projection protruding 42 toward the electronic element 95 and a first projection 41 protruding from the second projection 42 toward the electronic element 95.