A passive electronic component that includes a substrate with first and second main surfaces opposed in a first direction; and a capacitor on the first main-surface side. The capacitor has a capacitance-forming portion in which three or more inner electrode layers and dielectric layers are alternately laminated in the first direction. Counting all inner electrode layers from the substrate side in the first direction, layers at odd positions form a first group and layers at even positions form a second group. Nth inner electrode layers define a first group and (N-1)th inner electrode layers define a second group. In plan view from the first direction, a second direction is perpendicular to the average current flow. In a cross-section along the first and second directions, the opposed end portions of the Nth layer lie outward of those of the (N-1)th layer in the second direction.