A lawn mower includes a traveling driver, a mower motor, and at least one controller. At least one controller is configured to control the traveling driver in accordance with an operation of a user getting on the lawn mower, control the traveling driver to cause the lawn mower to travel autonomously, on a basis of information detected on the lawn mower, and control the mower motor. The lawn mower includes a lawn detection device configured to detect a condition of a portion of lawn on a front side in a traveling direction, and a position acquisition device configured to acquire self-position information. The at least one controller controls the traveling driver in such a manner that the lawn mower preferentially travels on a portion of lawn that needs to be mowed.