An illumination device comprising: a housing; a base located at one end of the housing, for supplying a voltage; a light source device provided on a mounting base located at the other end of the housing, wherein the light source device includes a first substrate having a first surface and a second surface on an opposite side of the first surface, a first reflecting member located on an area around a center of the first surface, having a shape of truncated cone with a side surface thereof making an acute angle with the first surface of the first substrate, the side surface of the first reflecting member having a light reflecting function, a plurality of first light-emitting elements provided on the first surface so as to surround the first reflecting member; a wiring pattern, provided on the first surface, including an anode land and a cathode land each of which is capable of being connected to outside, resin dams each being formed in a circular ring shape on the first surface and being provided respectively on an inner side and an outer side of a region in which the first light-emitting elements are provided, and a sealing resin for sealing the first light-emitting elements, the sealing resin (19, 38, 58) being provided so as to fill a part surrounded by the resin dams; a pair of lead wires for supplying the plurality of first light-emitting elements with a voltage from a drive circuit that is contained in said housing, the pair of lead wires being electrically connected to the anode land and the cathode land and being guided into said housing by passing through a through hole of the first substrate so as to be connected to the drive circuit, wherein the through hole is provided in a position facing a lower part of the first reflecting member and penetrates the mounting base and the first substrate; and a globe covering said light source device. a housing; a base located at one end of the housing, for supplying a voltage; a light source device provided on a mounting base located at the other end of the housing, wherein the light source device includes a first substrate having a first surface and a second surface on an opposite side of the first surface, a first reflecting member located on an area around a center of the first surface, having a shape of truncated cone with a side surface thereof making an acute angle with the first surface of the first substrate, the side surface of the first reflecting member having a light reflecting function, a plurality of first light-emitting elements provided on the first surface so as to surround the first reflecting member; a first substrate having a first surface and a second surface on an opposite side of the first surface, a first reflecting member located on an area around a center of the first surface, having a shape of truncated cone with a side surface thereof making an acute angle with the first surface of the first substrate, the side surface of the first reflecting member having a light reflecting function, a plurality of first light-emitting elements provided on the first surface so as to surround the first reflecting member; a wiring pattern, provided on the first surface, including an anode land and a cathode land each of which is capable of being connected to outside, resin dams each being formed in a circular ring shape on the first surface and being provided respectively on an inner side and an outer side of a region in which the first light-emitting elements are provided, and a sealing resin for sealing the first light-emitting elements, the sealing resin (19, 38, 58) being provided so as to fill a part surrounded by the resin dams; a pair of lead wires for supplying the plurality of first light-emitting elements with a voltage from a drive circuit that is contained in said housing, the pair of lead wires being electrically connected to the anode land and the cathode land and being guided into said housing by passing through a through hole of the first substrate so as to be connected to the drive circuit, wherein the through hole is provided in a position facing a lower part of the first reflecting member and penetrates the mounting base and the first substrate; and a globe covering said light source device.