Nowadays needleless electrospinning is a well-known technique to produce polymeric nanofibers on large scale. This study was conducted to see the influence of spinneret polarity on needleless electrospinning. Depending on the type of spinneret polarity, electrospinning led to different fiber morphology, productivity and areal density. The electric field profile in the electrospinning zone was analyzed by using finite element method. It was revealed that the intensity of electric field was higher in the part that was connected with a high voltage electrode. This could be the main reason of variances in fiber diameter, productivity and areal density