A grass collector is provided with a grass collector body which includes a storage space for storing grass clippings formed inside the grass collector body and a communication air passage having a first end connected to a rear part of the storage space to allow the storage space and the outside to communicate with each other; a duct which has a first end connected to a front part of the grass collector body and guides grass clippings to the grass collector body; and a dustproof net provided in the communication air passage.