This study was carried out to study effect of the insect infestation by Jasmine Thrips, Thrips orientalis (Bagnall) (Thysanoptera: Thripidae) at three levels of the infestation (low infestation, medium infestation and high infestation) on the quantitative and qualitative adjectives of jasmine flowers, Jasminum grandiflorum (Fam. Oleaceae) and jasmine oil. Experiments were carried out under plastic greenhouses at two locations (Governorates), El-Orman Garden (Giza Governorate) and The International Garden (Alexandria Governorate) during season 2021. This study was divided into three parts, the first part studied the population fluctuations of the successive insect T. orientalis (adults and nymphs) on jasmine plants (leaves and flowers), and classification this infestation to three levels (low infestation, medium infestation and high infestation). The second part of this study studied effect of this insect infestation by T. orientalis at the three levels of the infestation on the quantitative and qualitative adjectives of jasmine flowers. And the third part of this study studied effect of this insect infestation by the same insect at the three levels of the infestation on the quantitative and qualitative adjectives of jasmine oil. The obtained results indicated to the population fluctuations of the successive insect T. orientalis (adults and nymphs) during the season on both leaves and flowers of jasmine plants with notice that the general mean of the insect population on the flowers was relatively higher than on the leaves at both of the two successive locations. The obtained results also indicated to the clear effect of the insect infestation by T. orientalis (at three levels of the infestation) on all the quantitative and qualitative adjectives of jasmine flowers except color of the flower which did not change after infestation by T. orientalis. Lastly, the obtained results also indicated to the clear effect of the insect infestation by T. orientalis (at three levels of the infestation) on most quantitative and qualitative adjectives of jasmine oil.