This paper deals with the photoelectret effect in a natural plant product, Boswellia Glabra. It is found that this material in the pure form makes one of the best photoelectrets and gives a much more stable charge than other photoelectret substances. The sample is polarized for 5 min by the simultaneous application of field and illumination, then it is reilluminated and the depolarization current reveals the nature of the polarization. This paper also deals with the effect on photoelectret formation of continued application of the polarizing field for five more minutes, keeping the sample in the dark. It is found that this process gives much better stability of charge and longer life to the electret.