A wiring substrate includes: a first insulating layer; a plurality of wiring patterns formed on one surface of the first insulating layer; a dummy pattern formed, on the one surface of the first insulating layer, between the nearby wiring patterns; and a second insulating layer made of resin and formed on the one surface of the first insulating layer so as to cover the nearby wiring patterns and the dummy pattern, wherein the dummy pattern is a dot pattern arranged at a center portion between the nearby wiring patterns, and wherein a height of at least one dot constituting the dummy pattern is lower than heights of the nearby wiring patterns.