A distance measurement device includes an imaging unit, an emission unit which emits directional light as light having directivity to emit the directional light along an optical axis direction of an imaging optical system, a light receiving unit which receives reflected light of the directional light from a subject, a derivation unit which derives a distance to the subject based on a timing at which the directional light is emitted by the emission unit and a timing at which the reflected light is received by the light receiving unit, and a control unit which performs control such that the emission unit sets a timing, at which the directional light is emitted, to a predetermined period during which the influence of the emission of the directional light on an image signal is suppressed.