Paracobitis iranica is an endemic loach of Iran and little is known about its biology. This study was carried out to evaluated growth pattern of this species with 224 fish samples that obtained from February up to July 2013 with Electroshocker devices. Sex ratio of male to female was 1: 5.79 that showed significant difference between sex ration of male to female in population (X² = 111.45, p < 0.05). Maximum total length and weight were 88 mm and 5.69 g for females, 94 mm 6.11 g for males. The age of the operculum four age groups for both males and females, respectively. The weight - length relation of female was W = 0.009 TL^2.93 (r² = 0.97) and the weight- length relation of male was W = 0.009 TL^2.91 (r² = 0.99) and the total relation was W = 0.009 TL^2.93 (r² = 0.98). The results showed positive allometric growth (t-test, t_male= 1.70, t_{female =} 1.91, t_population= 2.46, p < 0.05).  The condition factor was estimated 0.89 ± 0.07 in male and 0.91 ± 0.11 in female and the total condition factor was 0.90 ± 0.10.