A dishwasher comprising: a case; a tub provided inside the case and forming a washing chamber in which a cleaning target can be accommodated; a sump disposed below the tub for collecting washing water; a washing pump for receiving the collected washing water from the sump; a heater coupled to a lower side of the washing pump for generating steam; and a steam nozzle (200, 300) connected to the washing pump by a steam hose for spraying steam to the washing chamber, wherein the steam nozzle (200, 300) comprises: a steam nozzle body (210, 310) having a steam inlet (211, 311) and including a steam accommodating portion (210a, 310a) for accommodating steam therein; a first steam sprayer (212a, 212b, 312a, 312b) provided in the steam nozzle body (210, 310) and spraying the steam accommodated in the steam accommodating portion (210a, 310a) to the inside of the washing chamber; and a second steam sprayer (213a, 213b, 313a, 313b) provided in the steam nozzle body (210, 310) and disposed at a position farther from the steam inlet (211, 311) than the first steam sprayer (212a, 212b, 312a, 312b), characterized in that a tunnel flow path (2121a, 2121b; 3121a, 3121b) penetrating through a lower end of the first steam sprayer (212a, 212b; 312a, 312b) is formed to allow steam passing through the tunnel flow path (2121a, 2121b) to be introduced into the second steam sprayer (213a, 213b; 313a, 313b). a case; a tub provided inside the case and forming a washing chamber in which a cleaning target can be accommodated; a sump disposed below the tub for collecting washing water; a washing pump for receiving the collected washing water from the sump; a heater coupled to a lower side of the washing pump for generating steam; and a steam nozzle (200, 300) connected to the washing pump by a steam hose for spraying steam to the washing chamber, wherein the steam nozzle (200, 300) comprises: a steam nozzle body (210, 310) having a steam inlet (211, 311) and including a steam accommodating portion (210a, 310a) for accommodating steam therein; a first steam sprayer (212a, 212b, 312a, 312b) provided in the steam nozzle body (210, 310) and spraying the steam accommodated in the steam accommodating portion (210a, 310a) to the inside of the washing chamber; and a second steam sprayer (213a, 213b, 313a, 313b) provided in the steam nozzle body (210, 310) and disposed at a position farther from the steam inlet (211, 311) than the first steam sprayer (212a, 212b, 312a, 312b), characterized in that a tunnel flow path (2121a, 2121b; 3121a, 3121b) penetrating through a lower end of the first steam sprayer (212a, 212b; 312a, 312b) is formed to allow steam passing through the tunnel flow path (2121a, 2121b) to be introduced into the second steam sprayer (213a, 213b; 313a, 313b). a steam nozzle body (210, 310) having a steam inlet (211, 311) and including a steam accommodating portion (210a, 310a) for accommodating steam therein; a first steam sprayer (212a, 212b, 312a, 312b) provided in the steam nozzle body (210, 310) and spraying the steam accommodated in the steam accommodating portion (210a, 310a) to the inside of the washing chamber; and a second steam sprayer (213a, 213b, 313a, 313b) provided in the steam nozzle body (210, 310) and disposed at a position farther from the steam inlet (211, 311) than the first steam sprayer (212a, 212b, 312a, 312b), characterized in that a tunnel flow path (2121a, 2121b; 3121a, 3121b) penetrating through a lower end of the first steam sprayer (212a, 212b; 312a, 312b) is formed to allow steam passing through the tunnel flow path (2121a, 2121b) to be introduced into the second steam sprayer (213a, 213b; 313a, 313b).