An optical module 100 includes a first substrate 11 including an optical filter device 7 having a wavelength variable interference filter 110 built therein, a second substrate 12 including a light receiving element 17, and a first supporter 16 that mechanically or electrically joins the first substrate 11 and the second substrate 12 to each other, in which the wavelength variable interference filter 110 and the light receiving element 17 are disposed to face each other by the first supporter 16, and the first substrate 11 and the second substrate 12 are joined to each other by the first supporter 16 with a gap S1 in which a circuit element 21 is mountable.