A transmission (10) for a lawn mower, for transmitting an output of a drive source (8) to a driving wheel (4), the transmission including a speed-change transmission device (11) and a power transmission device (12) movably coupled to the speed-change transmission device (11), wherein the power transmission device (12) includes a first power transmission device (13) coupled to the speed-change transmission device (11), and a second power transmission device (14) to which the driving wheel (4) is coupled, and the first power transmission device (13) and the second power transmission device (14) are movably coupled to each other.
