There are large numbers of medicinal plants which are reported to have beneficial effects on hair and are commonly used in formulation of shampoo. These plant products may be used in their powdered form, crude form, purified extracts, or derivative form. The plant Ricinus communis, the castor bean or castor oil plant, is a species of perennial flowering plant in the spurge family, Euphorbiaceae Castor oil has many uses in medicine and other applications. Castor oil and the plant's roots and leaves are used in the Indian Indigenous Medicinal System of Ayurveda for various diseases, and it has been investigated in a few limited studies for its potential as an anti-nociceptive and anti-inflammatory herbal medicine. This study deals with formulation, development and evaluation of Herbal Shampoo of Ricinus communis. The plant material specially aerial parts was collected and subjected to hydroalcoholic extraction. The formulated shampoo was further ananlyzed for all the parameters along with antimicrobial activity. The results showed that The yields were found to be 8.30g (8.30% w/w of crude drug) of Hydroacoholic extract with orange black colour semisolid mass, for Ricinus (aerial part). The phytochemical test revealed the presence of alkaloid, Glycosides, saponins, terpenoids, phenols, flavonoid, proteins & amino acid. Prepared shampoo was transparent, light green and had good odor. No significant difference was observed in terms of odor, transparency and foaming characteristics between commercial and formulated shampoo except for color. The pH of tested shampoo was 7.02. The percent solid contents of all the tested shampoo was found within the range of 22-25% and are expected to wash out easily. Shampoo exhibited satisfactory cleaning & foaming ability and actual effectiveness. Wetting time of shampoo was found to be 187. The shampoo at the concentration of 100mg/ml showed zone of inhibition of 8±0.5mm & 10±0.9mm for Klebsiella pneumoniae & E. coli respectively. Thus, it can be concluded that the shampoo exhibited all the ideal characteristics with potent antimicrobial effect. Keywords: Ricinus communis, Shampoo, Antimicrobial activity, Herbal medicine