A suspension board with circuit extending in a predetermined direction includes a base insulating layer, and a conductive layer disposed on one side in a thickness direction of the base insulating layer. The base insulating layer includes a first body base and a second body base disposed spaced apart from each other in a width direction, and a connection portion connecting a portion of the first body base in the longitudinal direction to a portion of the second body base in the longitudinal direction. The suspension board with circuit further includes a reinforcing portion disposed on the surface of the connection portion and reinforcing the connection portion. The reinforcing portion includes two or more resin layers laminated in the thickness direction, or a metal member.