A printed wiring board (10) includes: an inner layer structure body (20) containing at least an inner layer insulative base material (31) composed of a glass cloth (31a) and resin (31b) which covers the glass cloth (31a) and not containing a resin insulative base material composed only of resin; outer layer wiring (21) formed on a first face (20a) of the inner layer structure body (20); and a solder resist layer (23) formed on a surface of the outer layer wiring (21), wherein in the inner layer structure body (20), an opening part (11) is formed, and the solder resist layer (23) is composed of a first ink part (23a) covering at least the outer layer wiring (21) that is formed on a partial region of the first face (20a) which corresponds to the opening part (11) and a second ink part (23b) interposing both ends of the first ink part (23a) and being lower in flexibility than the first ink part (23a).