: Zinc is a cofactor of more than 100 enzymes that are essential for the metabolism of nucleic acid and protein synthesis. Zinc plays an important role in growth and development, immune response, neurological and reproductive functions. Monosodium glutamate (MSG) is the sodium salt of glutamic acid , a food flavor enhancer in the form of L-glutamic acid. The purpose of this study was to determine the effect of zinc on sperm quality adult male wistar (Rattus norvegicus), following administration of monosodium glutamate (MSG). This study is experimental with a completely randomized design were conducted from November to Desember 2014 using a sample of 6 male wistars as a control group (P0) with 2 mg MSG being administered. The P1 group consist of 2 male wistars with 2 mg of MSG and zinc at a dose of 10 mg as treatment were administered to this group. The last group P2 also consist of 2 male wistars with the administration 2 mg of MSG and 20 mg doses of zinc as treatment.This study results in an increasement of spermatozoa consentration in the treatment group (P2), accounted for 78,25x106 as well as the increased of spermatozoa motility of 43,5 % for the treadment group (P2). Morfologically, 83,5 % of normal spermatozoa were accounted from the same group. Conclusion: Administration of zinc can improve the quality of male wistar spermatozoa following the administration of MSG, which includes concentration, motility and morphology. The increasing dosage of zinc being administered showed higher impact in improving the quality of spermatozoa