To provide a sensor module with easily manufacturing and assembling that can be miniaturized.

A case 1 integrated with a lens is formed by a lens part 11 with a dome shape and a cylindrical case part 12 that integrally stretches from the lower end of the lens part 11. A sensor 2 is mounted on the upper surface of an attachment plate 3, and a plurality of terminals 21, 22, 23 of the sensor 2 are passed through the plate 3 and a circuit substrate 4 to be projected below and is connected to a circuit element mounted on the substrate 4 at the penetration part of the substrate 4. The sensor 2 is housed in the case 1, and an opening at the lower end of the case 1 is covered with an under plate 5. The terminals 21, 22, 23 are passed through the plate 5 to be projected below. A rib stopper 12a that controls a store position of the sensor 2 is placed inside the case 1. A spacer 31, which has a through hole 31a that the terminals of the sensor 2 can be fitted on the under surface of the plate 3 and controls a space between the plate 3 and the substrate 4, is formed. The hole 31a is formed to a hole with a smaller diameter than diameters of the terminals 21, 22, 23, and the terminals 21, 22, 23 are pressed into the hole 31a.