Kotšetšum (vene Кочечум) on jõgi Aasias.
Algab Putorana mägismaalt. Seejärel voolab Kesk-Siberi kiltmaal valdavalt kagusse. Alamjooksul pöördub edelasse. Suubub paremalt Alam-Tunguskasse.
Pikkus 733 km, valgla 96 400 km².
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