An imaging module includes an imaging substrate mounting an imaging device thereon, a substrate holding plate, a holder. The substrate holding plate includes four substrate securing portions for securing the imaging substrate that are located opposing to four corners of the imaging substrate, respectively, an opening portion surrounded by the four substrate securing portions, and four holder securing portions that are located outwardly from the four substrate securing portions in a longitudinal direction thereof, respectively. The holder is formed integrally with a lens support barrel configured to support a lens unit at an inside thereof, and has plate securing portions configured to secure the holder securing portions at positions opposed to the holder securing portions of the substrate holding plate, respectively. The imaging module causes little residual compressive stress left in the imaging substrate, so that it can acquire high-resolution images.