To provide a semiconductor light-emitting device at low cost, which responds to a demand and which is compact and has a high light-emitting output.

A semiconductor light-emitting device comprises: a pair of external connection terminals 11a, 11b provided on an insulating surface 10a of a substrate 10; a plurality of element connection electrode pairs 12 each composed of land-shaped paired electrodes 12a, 12b arranged on the insulating surface 10a between the pair of external connection terminals 11a, 11b; and LED chips 1 each mounted on each element connection electrode pair 12 in a manner such that paired electrode arranged on an undersurface are electrically connected and fastened to respective electrodes of the element connection electrode pair. Each of the electrodes 12a, 12b of each element connection electrode pair 12 is electrically connected with either one of the external connection terminals 11a, 11b or either one of paired electrodes 12a, 12b of the other adjacent element connection electrode pair 12 by a wiring wire 2 and all of a plurality of LED chips 1 is electrically connected between one pair of external connection terminals 11a and 11b.