Modeling studies on current distributions along the cochlea produced by an intracochlear electrode array were conducted in a tank model. The tank consisted of a 22‐banded electrode array fixed into a normal saline‐filled tube of 5 mm diameter. Bipolar electrical stimulation was used, and the potentials within the saline were measured to enable the calculation of the current distribution. Current distribution depended on the ratio of the radial distance from the electrode array at which the distribution was measured to the distance between the two electrode bands used for bipolar stimulation. For small ratios, the distribution displayed two peaks directly above the two bands; while for large ratios, the distribution displayed only one peak midway between the two bands. Also investigated was the interaction that occurs when more than one bipolar pair were stimulated simultaneously. The results showed that the resulting distribution also depended on the above defined ratio. These results obtained from the tank model were verified by computer simulation.