Coccidiosis is a disease of protozoan origin, causing heavy morbidities and mortalities in the poultry sector. It is controlled by synthetic coccidiosis and coccidiostats which are losing their efficacy because of resistance and public health issues. Botanicals, especially essential oils, are safe and eco-friendly potent alternatives for the control of coccidiosis. For this purpose, anticoccidial activities of the ethanolic extract of clove (Syzygium aromaticum) were estimated on the broiler chicken. The essential oil of clove was extracted through hydro distillation and phytochemical analysis was performed with high-performance liquid chromatography (HPLC).  7 groups of broilers were formed, each having 3 replicates of 20 birds each. Ethanolic extract of clove was administered at 100, 200, and 300ppm doses in feed. Medicated control (Toltrazuril @ 1mg/L), infected nonmedicated control, and noninfected non-medicated control groups were maintained. These groups, except noninfected non-medicated control were induced coccidiosis experimentally.  The results were analyzed statistically by analysis of variance and the Tukey test was used for comparison of means. Results stated that clove essential oil effectively controlled lesions in a dose-dependent trend.  300ppm concentration of extract had statistically comparable (P>0.05) effects to the standard medicated control group in protecting cecal lesions, oocyst scores, oocyst per gram of feces, and red blood cell count. Weight gain and feed conversion ratio were better than the medicated control at 300ppm concentration of the extract, whereas the serological parameters remained undisturbed, which indicated that the extract had no toxic effects on liver and kidney functions. This research suggests using essential clove oil to control coccidiosis in broiler chickens.