Today more than 21000 species, 2600 genus, 250 families and 10 orders are identified among copepods, out of which only four orders, that is; Cyclopoida, Calanoida, Harpacticoida and Gelyelloid are more or less fresh water habitat and approximately most of them are free living. The aim of this study is to species identification of order Harpacticoida (copepods) from Markazii Province. The present study covered one entire year of 2014 (Jan, to Dec.) The sampling was done at different stagnant and running water surface bodies of Markazi Province. Collections were made with a dip net of no. 10 mesh aperture.In the present investigation only one genus (Canthocamptus) represented with one species C. staphylinus belonging to the family Canthocamptidae was recognized.
