An electrical contactor to form electrical connection between a first contact target and a second contact target, the electrical contactor comprising: a barrel having a spring part (40b, 40d, 40f) achieving a spring function, the spring part (40b, 40d, 40f) being formed in a partial section in a longitudinal direction; a first plunger inserted at least partially in the barrel through one end of the barrel, the first plunger being to electrically contact the first contact target; and a second plunger inserted at least partially in the barrel through an opposite end of the barrel to close an opening at the opposite end of the barrel, the second plunger being to electrically contact the second contact target, wherein an end part of the first plunger in the barrel and an end part of the second plunger in the barrel are placed in internal space of a same non-spring part (40a, 40c, 40e, 40g) of the barrel, the non-spring part (40a, 40c, 40e, 40g) belonging to multiple non-spring parts of the barrel not to achieve a spring function, wherein the barrel has three or more spring parts (40b, 40d, 40f) separated while non-spring parts (40a, 40c, 40e, 40g) are placed between the spring parts (40b, 40d, 40f), wherein a gap is formed between an end part of the second plunger in the barrel and the end part of the first plunger in the barrel, wherein the first plunger or the second plunger are inserted into the internal space of the whole spring part (40b, 40d, 40f) and the non-spring part (40a, 40c, 40e, 40g) other than the non-spring part (40a, 40c, 40e, 40g) where the end part of the second plunger in the barrel and the end part of the first plunger in the barrel are positioned in the internal space, wherein the spring part (40b, 40d, 40f) and the non-spring part (40a, 40c, 40e, 40g) not to achieve spring function are being arranged in a line in a longitudinal direction in the barrel, wherein the non-spring part (40a, 40g) is formed respectively on both ends of the barrel, the corresponding plunger (41, 42) being fixed to the both ends of the barrel. a barrel having a spring part (40b, 40d, 40f) achieving a spring function, the spring part (40b, 40d, 40f) being formed in a partial section in a longitudinal direction; a first plunger inserted at least partially in the barrel through one end of the barrel, the first plunger being to electrically contact the first contact target; and a second plunger inserted at least partially in the barrel through an opposite end of the barrel to close an opening at the opposite end of the barrel, the second plunger being to electrically contact the second contact target, wherein an end part of the first plunger in the barrel and an end part of the second plunger in the barrel are placed in internal space of a same non-spring part (40a, 40c, 40e, 40g) of the barrel, the non-spring part (40a, 40c, 40e, 40g) belonging to multiple non-spring parts of the barrel not to achieve a spring function, wherein the barrel has three or more spring parts (40b, 40d, 40f) separated while non-spring parts (40a, 40c, 40e, 40g) are placed between the spring parts (40b, 40d, 40f), wherein a gap is formed between an end part of the second plunger in the barrel and the end part of the first plunger in the barrel, wherein the first plunger or the second plunger are inserted into the internal space of the whole spring part (40b, 40d, 40f) and the non-spring part (40a, 40c, 40e, 40g) other than the non-spring part (40a, 40c, 40e, 40g) where the end part of the second plunger in the barrel and the end part of the first plunger in the barrel are positioned in the internal space, wherein the spring part (40b, 40d, 40f) and the non-spring part (40a, 40c, 40e, 40g) not to achieve spring function are being arranged in a line in a longitudinal direction in the barrel, wherein the non-spring part (40a, 40g) is formed respectively on both ends of the barrel, the corresponding plunger (41, 42) being fixed to the both ends of the barrel.