Male accessory gland (MAG) proteins that are secretory in nature delivered to females, along with sperms affects female reproductive physiology and behavior. In our study, proteomic approaches were employed to identify the MAG proteins of L. orbonalis, a monophagous and most destructive pest on brinjal. A set of 117 spots in virgin MAG and 186 in mated MAG were obtained from 2-D gel electrophoresis. The differentially expressed MAG proteins after mating in comparison with the virgin male were 14 upregulated and 16 down-regulated. We have used MALDI- MS to identify the 13 unique proteins within the virgin MAG of the L. orbonalis and analyzed with the Swiss-Prot database using a Mascot search engine. The proteins were identified as proteolysis regulators, lipid transporter, olfactory protein, metabolism, DNA binding, and hexamerins. This is the first report on proteome analysis of MAG of the Leucinodes orbonalis.