A front cowl structure for a saddle riding type vehicle, comprising: a front cowl (10, 10A) for covering at least a vehicle leading end portion; and a pair of headlights (18, 18A) disposed on both leading end lateral sides of the front cowl (10, 10A), each of the headlights (18, 18A) having a lens surface (18a, 18Aa) including at least a part formed to face downwardly, the front cowl structure having headlight neighboring openings (10h, 10Ah) communicating with an inside of the front cowl (10, 10A), characterized in that the headlights (18, 18A) are each formed into a horizontally long, substantially rectangular shape extending from a front surface side of the front cowl (10, 10A) to a corresponding lateral surface, so that the lens surface (18a, 18Aa) formed into an outer surface shape extending substantially along a cowl outer surface in order that air flows smoothly along the lens surfaces (18a, 18Aa) while the vehicle is running; the headlight neighboring openings (10h, 10Ah) are disposed on the rear portion side of the lens surfaces (18a, 18Aa) to branch a lens surface airflow flowing along the lens surfaces (18a, 18a) into an airflow flowing in the headlight neighboring openings and a surface airflow that flows toward the rear of the vehicle in order to disrupt a laminar flow condition of the lens surface airflow; and the headlight neighboring openings (10h, 10Ah) are each a slit-shaped opening extending in a vehicle body vertical direction and are each formed by a lens edge portion (18ae, 18Aae) of the headlight (18, 18A) and a headlight opening edge portion (10he, 10Ahe) of the front cowl (10, 10A). a front cowl (10, 10A) for covering at least a vehicle leading end portion; and a pair of headlights (18, 18A) disposed on both leading end lateral sides of the front cowl (10, 10A), each of the headlights (18, 18A) having a lens surface (18a, 18Aa) including at least a part formed to face downwardly, the front cowl structure having headlight neighboring openings (10h, 10Ah) communicating with an inside of the front cowl (10, 10A), characterized in that the headlights (18, 18A) are each formed into a horizontally long, substantially rectangular shape extending from a front surface side of the front cowl (10, 10A) to a corresponding lateral surface, so that the lens surface (18a, 18Aa) formed into an outer surface shape extending substantially along a cowl outer surface in order that air flows smoothly along the lens surfaces (18a, 18Aa) while the vehicle is running; the headlight neighboring openings (10h, 10Ah) are disposed on the rear portion side of the lens surfaces (18a, 18Aa) to branch a lens surface airflow flowing along the lens surfaces (18a, 18a) into an airflow flowing in the headlight neighboring openings and a surface airflow that flows toward the rear of the vehicle in order to disrupt a laminar flow condition of the lens surface airflow; and the headlight neighboring openings (10h, 10Ah) are each a slit-shaped opening extending in a vehicle body vertical direction and are each formed by a lens edge portion (18ae, 18Aae) of the headlight (18, 18A) and a headlight opening edge portion (10he, 10Ahe) of the front cowl (10, 10A).