An electronic device has a substrate 10, an electronic element 80 provided on the substrate 10 and a sealing part 20 for sealing the electronic element 80. The sealing part 20 has an insertion part 22 for inserting a fastening member 90. The insertion part 22 is provided in a sealing recessed part 25 recessed compared with a circumferential region. At least side surface and the sealing recessed part 25 of the sealing part 20 are exposed to the outside.