Coated graphite Gallium ion selective electrode was developed by depositing a membrane comprising of Aliquat-336 loaded with Gallium in the form GaCI./ and poly vinyl chloride in the ratio of 70:30. Specific properties of the electrodes were' studied inc!udini· calibration curve, slope, detection limit, concentration range, response time and life time. The effect ofchloride concentration was investigated. This coated graphite Gallium ion selective electrode exhibits linear Nernstian response over gallium concentration range of lxlO^—IM -1xl0^-1M of Ga(IIl) ions in constant chloride concentration of 6M with a detection limit of 2xl0^-5 M calibration slope of-58.2 mV ± 1.0 m Vldecade change in concentration of Ga. Interference of u', Na⁺, K, Ca²⁺. Ml⁺, Ba²⁺. Fe³⁺, Cr³⁺, Ni ³⁺, Th⁴⁺, U(V!), OH, col and N0₃^- on electrode response have also been investigated. The selectivity coefficients of this electrode with respect to the different ions were determined by matched potential method. This coated graphite gallium ion selective electrode can be usedfor consecutive three months without losing Nernstian response.