An antenna element for forming an antenna device (10, 10A-E) by being mounted on a ground conductor via a dielectric body , wherein: the antenna element comprises an upper conductor (221, 221A-C), at least one first lower conductor , at least one second lower conductor , at least one first leg portion , at least one second leg portion and at least one feeding portion ; the upper conductor (221, 221A-C) has a middle portion , a ring portion and a coupling portion ; the ring portion is located apart from the middle portion and continuously surrounds the middle portion ; the coupling portion couples the middle portion and the ring portion to each other; the at least one first leg portion extends from the middle portion ; the at least one second leg portion extends from the ring portion ; the at least one first lower conductor is apart from the upper conductor (221, 221A-C) in an up-down direction and connected to the at least one first leg portion ; the at least one second lower conductor is distinct and separated from the at least one first lower conductor and is apart from the at least one first lower conductor ; the at least one second lower conductor is apart from the upper conductor (221, 221A-C) in the up-down direction and connected to the at least one second leg portion ; the at least one feeding portion extends from the upper conductor (221, 221A-C); the at least one first lower conductor and the at least one first leg portion are the same as each other in number and connected to each other in a one-to-one relationship; and the at least one second lower conductor and the at least one second leg portion are the same as each other in number and connected to each other in a one-to-one relationship, the at least one first lower conductor and the at least one second lower conductor are configured to be each capacitively connected to a ground conductor . the antenna element comprises an upper conductor (221, 221A-C), at least one first lower conductor , at least one second lower conductor , at least one first leg portion , at least one second leg portion and at least one feeding portion ; the upper conductor (221, 221A-C) has a middle portion , a ring portion and a coupling portion ; the ring portion is located apart from the middle portion and continuously surrounds the middle portion ; the coupling portion couples the middle portion and the ring portion to each other; the at least one first leg portion extends from the middle portion ; the at least one second leg portion extends from the ring portion ; the at least one first lower conductor is apart from the upper conductor (221, 221A-C) in an up-down direction and connected to the at least one first leg portion ; the at least one second lower conductor is distinct and separated from the at least one first lower conductor and is apart from the at least one first lower conductor ; the at least one second lower conductor is apart from the upper conductor (221, 221A-C) in the up-down direction and connected to the at least one second leg portion ; the at least one feeding portion extends from the upper conductor (221, 221A-C); the at least one first lower conductor and the at least one first leg portion are the same as each other in number and connected to each other in a one-to-one relationship; and the at least one second lower conductor and the at least one second leg portion are the same as each other in number and connected to each other in a one-to-one relationship, the at least one first lower conductor and the at least one second lower conductor are configured to be each capacitively connected to a ground conductor . <EOS>