A dust collector comprising: a dust collection portion (41, 42) configured to suck dust through a dust collection hose; a communication portion (61, 62) configured to wirelessly communicate with an electric working machine; a changeover switch configured to be changed among an interlock state of making the dust collector operate interlocking with an operation of the electric working machine, an uninterlock state of inhibiting an interlocking operation, and an off state of stopping an operation of the dust collector; and an interlock operation control portion (64, 50) configured to make the dust collection portion perform the interlock operation with the electric working machine when the communication portion receives an interlock command transmitted from the electric working machine with the changeover switch being in the interlock state, wherein the interlock operation control portion comprises a storage portion in which identification information is stored, the identification information being specific to the electric working machine with which the dust collection portion is to be made to perform the interlock operation, wherein the interlock command includes an interlock operation request signal requesting the interlock operation and an identification signal indicating the identification information, and wherein the interlock operation control portion is further configured such that, while the communication portion receives the interlock command periodically and repeatedly transmitted by the electric working machine during operation of the electric working machine, the interlock operation control portion makes the dust collection portion perform the interlock operation, and when the communication portion has not received the interlock command for a specified period of time or more, the interlock operation control portion stops the interlock operation of the dust collection portion. a dust collection portion (41, 42) configured to suck dust through a dust collection hose; a communication portion (61, 62) configured to wirelessly communicate with an electric working machine; a changeover switch configured to be changed among an interlock state of making the dust collector operate interlocking with an operation of the electric working machine, an uninterlock state of inhibiting an interlocking operation, and an off state of stopping an operation of the dust collector; and an interlock operation control portion (64, 50) configured to make the dust collection portion perform the interlock operation with the electric working machine when the communication portion receives an interlock command transmitted from the electric working machine with the changeover switch being in the interlock state, wherein the interlock operation control portion comprises a storage portion in which identification information is stored, the identification information being specific to the electric working machine with which the dust collection portion is to be made to perform the interlock operation, wherein the interlock command includes an interlock operation request signal requesting the interlock operation and an identification signal indicating the identification information, and wherein the interlock operation control portion is further configured such that, while the communication portion receives the interlock command periodically and repeatedly transmitted by the electric working machine during operation of the electric working machine, the interlock operation control portion makes the dust collection portion perform the interlock operation, and when the communication portion has not received the interlock command for a specified period of time or more, the interlock operation control portion stops the interlock operation of the dust collection portion.