A saddle type vehicle comprising: a handlebar unit provided forward of a seat in a vehicle forward/rearward direction, the seat held by a vehicle body frame; a left grip portion and a right grip portion respectively provided on a left end portion and a right end portion of the handlebar unit; and an input device provided to the handlebar unit, the input device configured to be operable with a palmar side of a thumb of a hand gripping one of the left grip portion and the right grip portion; wherein the input device comprises: a case; and a rotating body including an operational surface arranged in a circumferential direction, wherein a portion of said operational surface is accommodated in the case and a remaining portion of said operational surface is exposed to an outside of the case, the rotating body being rotatable about an axis (Cr) extending in a longitudinal direction of the corresponding one of the grip portions by swinging the thumb of the hand gripping the one of the grip portions while the palmar side of the thumb is in contact with the portion of the operational surface which is exposed to the outside of the case, characterised in that the operational surface extends continuously along the entire circumference of the rotating body without interruption. a handlebar unit provided forward of a seat in a vehicle forward/rearward direction, the seat held by a vehicle body frame; a left grip portion and a right grip portion respectively provided on a left end portion and a right end portion of the handlebar unit; and an input device provided to the handlebar unit, the input device configured to be operable with a palmar side of a thumb of a hand gripping one of the left grip portion and the right grip portion; wherein the input device comprises: a case; and a rotating body including an operational surface arranged in a circumferential direction, wherein a portion of said operational surface is accommodated in the case and a remaining portion of said operational surface is exposed to an outside of the case, the rotating body being rotatable about an axis (Cr) extending in a longitudinal direction of the corresponding one of the grip portions by swinging the thumb of the hand gripping the one of the grip portions while the palmar side of the thumb is in contact with the portion of the operational surface which is exposed to the outside of the case, characterised in that the operational surface extends continuously along the entire circumference of the rotating body without interruption. a case; and a rotating body including an operational surface arranged in a circumferential direction, wherein a portion of said operational surface is accommodated in the case and a remaining portion of said operational surface is exposed to an outside of the case, the rotating body being rotatable about an axis (Cr) extending in a longitudinal direction of the corresponding one of the grip portions by swinging the thumb of the hand gripping the one of the grip portions while the palmar side of the thumb is in contact with the portion of the operational surface which is exposed to the outside of the case, characterised in that the operational surface extends continuously along the entire circumference of the rotating body without interruption.