DUST COLLECTOR AND VACUUM CLEANER

PROBLEM TO BE SOLVED: To provide a dust collector capable of simultaneously disposing of dust separated by a first separation part and dust separated by a second separation part by mixing them while independently storing both kinds of dust, and also preventing the dust separated by the second separation part from flying and leaking outside when mixing the dust.SOLUTION: A dust collection body part 48 includes a cup part 82 inserted to a cylindrical tubular member 81 where a separation body part 47 is attached to one end. The cup part 82 includes a partitioning part 92 continuously arranged from a cup part body 91 for partitioning a first dust collection part 95 storing coarse dust D1. The partitioning part 92 is brought into contact with a wall part 55 of the separation body part 47 in a state where the cup part 82 is moved toward the tubular member 81 so as to perform the partition of a second dust collection part 107 from the wall part 55. The partitioning part 92 is separated from the wall part 55 in a state where the cup part 82 is moved in the opposite direction of the tubular member 81 so as to allow fine dust D2 inside the second dust collection part 107 to move into the first dust collection part 95.