An illuminating device configured by forming a substrate (10, 20, 30) mounted with a plurality of light emitting elements (13, 23, 33), wherein the substrate (10, 20, 30) includes: a first portion (10A, 20A, 30A) having a shape extending in a first direction and having flexibility, and a plurality of second portions (10B, 20B, 30B) made from a material harder than the first portion, each second portion (10B, 20B, 30B) extending in a second direction different from the first direction, each second portion (10B, 20B, 30B) being mounted with at least one light emitting element (13, 23, 33); the substrate (10, 20, 30) further includes a wiring (17, 27, 37.) for connecting the plurality of light emitting elements (13, 23, 33) over the first portion (10A, 20A, 30A) and the plurality of second portions (10B, 20B); the first portion (10A, 20A, 30A) is formed in a predefined shape according to the illuminating device; and each of the second portions (10B, 20B, 30B) is positioned according to an irradiating direction of the light emitting element (13, 23, 33) being when mounted and is positioned by folding at a bent portion (16, 26, 36) between the first portion and each of the second portions, characterized in that the first portion (10A, 20A, 30A) includes a plurality of pads (12, 22, 32) extending in the first direction and being arranged for every predefined interval in the first direction, each second portion (10B, 20B. 30B) is connected to the first portion (10A, 20A, 30A) between two adjacent pads (12, 22, 32) included in the first portion (10A, 20A, 30A), and the wiring (17, 27, 37) electrically connects the terminal of the mounted at least one light emitting element (13, 23, 33) to the two adjacent pads (12, 22, 32), wherein the substrate (10, 20, 30) comprises a first light emitting element and a second light emitting element positioned along the second direction, wherein the substrate (10, 20, 30) is configured to be separable between two of the plurality of pads (12, 22, 32) in the first direction to form separate substrate pieces and separable between the first light emitting element and the second light emitting element in the second direction, wherein the first light emitting element is comprised in a separated portion comprising a bypass terminal configured to receive a short circuit member to provide a series electrical connection between the first light emitting element and a pad in the first portion (10A, 20A, 30A). a first portion (10A, 20A, 30A) having a shape extending in a first direction and having flexibility, and a plurality of second portions (10B, 20B, 30B) made from a material harder than the first portion, each second portion (10B, 20B, 30B) extending in a second direction different from the first direction, each second portion (10B, 20B, 30B) being mounted with at least one light emitting element (13, 23, 33); the substrate (10, 20, 30) further includes a wiring (17, 27, 37.) for connecting the plurality of light emitting elements (13, 23, 33) over the first portion (10A, 20A, 30A) and the plurality of second portions (10B, 20B); the first portion (10A, 20A, 30A) is formed in a predefined shape according to the illuminating device; and each of the second portions (10B, 20B, 30B) is positioned according to an irradiating direction of the light emitting element (13, 23, 33) being when mounted and is positioned by folding at a bent portion (16, 26, 36) between the first portion and each of the second portions, characterized in that the first portion (10A, 20A, 30A) includes a plurality of pads (12, 22, 32) extending in the first direction and being arranged for every predefined interval in the first direction, each second portion (10B, 20B. 30B) is connected to the first portion (10A, 20A, 30A) between two adjacent pads (12, 22, 32) included in the first portion (10A, 20A, 30A), and the wiring (17, 27, 37) electrically connects the terminal of the mounted at least one light emitting element (13, 23, 33) to the two adjacent pads (12, 22, 32), wherein the substrate (10, 20, 30) comprises a first light emitting element and a second light emitting element positioned along the second direction, wherein the substrate (10, 20, 30) is configured to be separable between two of the plurality of pads (12, 22, 32) in the first direction to form separate substrate pieces and separable between the first light emitting element and the second light emitting element in the second direction, wherein the first light emitting element is comprised in a separated portion comprising a bypass terminal configured to receive a short circuit member to provide a series electrical connection between the first light emitting element and a pad in the first portion (10A, 20A, 30A).