To provide an LED lamp capable of acquiring a desired optical characteristic in a substrate mounting state while using an existing mounting apparatus, and to provide a manufacturing method thereof.

A mounting line passing through the centers of protrusions 501, 511 for unevenly engaging a case 11 having reflection surfaces 110, 111 is virtually set, and LED elements 2 are mounted on the mounting line L. Thus, positioning accuracy between the case 11 and the LED elements 2 is improved, and uniform optical radiation performance can be obtained by equalizing light incident angels from each of the LED elements 2 for the reflection surfaces 110, 111.