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Parablechnum is a genus of ferns in the family Blechnaceae, subfamily Blechnoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I).

[1] The genus is accepted in a 2016 classification of the family Blechnaceae,[2] but other sources sink it into a very broadly defined Blechnum, equivalent to the whole of the PPG I subfamily.

[3] As of December 2019[update], using the PPG I classification system, the Checklist of Ferns and Lycophytes of the World accepted the following species:[4]