Contamination of medicinal herbs by microorganismPost harvest processing of medicinal herb in handled tradisionally in long periods. The conditions of processing might be trend to contaminated by microorganism. The contaminant is harmful to consumer health and cousing a claim on export. Some microorganism which known to contaminated medicinal herbs material are bacterial group Pseudomonas solanacearum, Xanthomonas sp.; Staphylococcus albus, S. aureus; S. alpha; Bacillus, Proteus, and Coliform and fungae group i.e. Aspergillus flavus; A. niger; rhizopus sp., Sclerotium sp., Rhizoctonia sp.; Penicillium sp.; Fusarium axysporum; F. moniliforme; Fusarium spp. and Gliocladium sp.Once of the some alternative to control the medicinal herbs contamination in investation control including field control and improve storage processing.