PROBLEM TO BE SOLVED: To provide a blower to/from which a filter can be easily attached/detached.SOLUTION: A filter (prefilter 8) attached between an intake port and blowing means includes a knob part 82 forming a ventilation passage near the intake port, and a filter part 81, a lib 823 is formed on one end (intake port side) of the knob part 82 and a recess 822 is formed on the other end (filter part 81 side). Since a user can attach/detach the prefilter 8 by picking up the lib 823 with fingers or holding the recess 822 of the knob part 82 with a hand, operability of attachment/detachment is improved.
