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Rhenium diselenide (ReSe 2 ) is a kind of VIIB transition metal dichalcogenides (TMDs) with a unique distorted 1T structure which is different from the VIB TMDs (MoS 2 , WS 2 , MoSe 2 , WSe 2 , etc), resulting in its special optical properties. In this work, we proposed and demonstrated a passively Qswitched Ybdoped fiber laser using ReSe 2 as a saturable absorber (SA). ReSe 2 nanosheets were prepared by liquid phase exfoliation method and mixed with polyvinyl alcohol (PVA) to form a SA compatible with fiber. By inserting the ReSe 2 PVA film into the two fiber ferrules of the fiber laser, a stable Qswitched operation at 1.06 µm was achieved. It had a maximum output power of 1.21 mW with a maximum pulse energy of 30.4 nJ and a minimum pulse duration of 2.27 µs. This work realizes a Qswitched fiber laser with stable performance based on the ReSe 2 prepared using a low cost, simple and scalable method.