The disclosure relates to a circular saw, in particular a hand-held circular saw, having a housing and a drive unit, at least some sections of which are arranged in the housing and with which a tool holder for an exchangeable saw blade is associated. The drive unit is designed to rotationally drive the exchangeable saw blade about an associated axis of rotation. In the circular saw, a blade guard is associated with the exchangeable saw blade. The blade guard is mounted in the housing for rotation about the associated axis of rotation and extends around a cutting point of the exchangeable saw blade at least during a sawing operation in such a way that contact with the cutting point can be at least substantially prevented.