Near infrared illuminator for driving support systems facilitating adjustment of its optical axis

A near infrared illuminator (1) can facilitate the adjustment of an optical axis thereof with favorable accuracy. The near infrared illuminator (1) can include: an infrared LED (71) configured to emit near infrared rays; and a projector lens (81) configured to project the near infrared rays emitted from the infrared LED (71) forward to form a predetermined light distribution pattern (P 0 ) in front thereof. The projector lens (81) can include a light distribution control section (81a) configured to project part of the near infrared rays emitted from the infrared LED (71) forward to form the predetermined light distribution pattern (P 0 ), and a marker forming section (81b) configured to project part of the near infrared rays emitted from the infrared LED (71) forward to form an alignment marker (M 0 ) for positioning the light distribution pattern (P 0 ), at a predetermined position beside the light distribution pattern (P 0 ).