An inexpensive current transformer support device having a simple configuration and easy to manufacture and a switchgear are provided. A current transformer support device includes three plate-like conductors (41), each of which has a first connection portion (41 a) at one end and a second connection portion (41b) at the other end, and which are aligned linearly side by side while being spaced apart from one another, and a current transformer case (42) which integrally insulates and supports the three conductors between the one end and the other end. The current transformer support device is characterized in that the current transformer case (42) has current transformer attachment portions (42a) provided at positions corresponding to at least two of the three conductors, to which ring-like current transformer coils (43) formed so as to insert the conductors are attached, and that the current transformer case (42) and the current transformer coils (43) attached to the current transformer attachment portions (
