A flex-rigid wiring board includes a flexible substrate having a first surface and a second surface on the opposite side of the first surface, a first conductive pattern formed on the first surface of the flexible substrate, a second conductive pattern formed on the second surface of the flexible substrate, and a conductor made of a conductive paste and formed in a first hole penetrating through the flexible substrate such that the first conductive pattern and the second conductive pattern are electrically connected to each other.