A particulate matter reduction apparatus for a diesel engine, which can reduce particulate matter in a convenient manner with a relatively simple structure, while preventing the shortening of the lifespan of a filter and improving particulate matter burning efficiency, is provided. The particulate matter reduction apparatus includes a housing configured to be placed on a flow path into which exhaust gas is discharged from the diesel engine, a filter configured to collect particulate matter contained in the exhaust gas that flows in the housing, electrodes configured to transmit electronic signals to the filter, and a control unit configured to control the electric signals provided to the electrodes. The particulate matter reduction apparatus is advantageous in that particulate matter is burnt and removed by directly heating the filter. In addition, the apparatus is more convenient, compared to a system which requires a filter to be separated and cleaned. In addition, the particulate matter reduction apparatus has a more simplified structure, compared to a system that heats a filter using an electric heater or a diesel burner. Accordingly, the manufacturing cost can be reduced. Furthermore, the particulate matter reduction apparatus is advantageous in that the filter is relatively uniformly heated rather than being partially heated, so that a long lifespan of the filter can be assured.