A riding-type mower includes i) a vehicle body (1), and ii) a mower unit (2) which is connected to the vehicle body (1), wherein the mower unit (2) has i) a first rotatable cutting blade (21), a second rotatable cutting blade (22), and a third rotatable cutting blade (23) which cut grass or lawn while rotating, and ii) a mower deck (20) which accommodates the rotatable cutting blade (21, 22, 23) and is provided with a cut grass discharge opening (14) in a rear portion of the mower deck, and wherein a guard member (150) is disposed behind the cut grass discharge opening (14).
