Organ morphometry can be used as an indicator of damage and functioning of an organ. The purpose of this study is to conduct morphometric analysis of the length, weight, diameter of the Methaphire posthuma body  to increase morphometry changes in the body's reproductive organs. The benefit of this research can be as an initial analysis of identifying the relationship of population with morphometry of reproductive organ growth. Methaphire posthuma worm samples were taken in February to March with a purposive random sampling method at the habitat of banana trees in 8 locations on the Sidoarjo region. Then the methaphire posthuma worm is measured for morphometry and analyzed using Principle Component Analysis (PCA) analysis. Morphometry results show. A) Body diameter has a relationship with body diameter with the size of the distance of the male genital hole (0.915); with a distance of spermateka (0.623); with vesicle diameter (0.806); with prostate diameter (0.737); and body diameter to the size of the female hole (0.730). B) body length is related to the size of the male genital hole (0.553), C) body weight is not related to the size of the reproductive organs. Conclusion Body diameter has more to do with the morphometry of the reproductive organs, and is not related to body weight and length.