We have two types of fungal sinusitis, invasive and non - invasive type. The most dangerous is the invasive one, where we have a destruction of the adjacent structures of the maxillary antrum, such as orbit. The non invasive type is the commonest one. It is of utmost importance that physicians suspect the possibility of fungal sinusitis in these patients, especially if they do not respond to medical treatment or when they present complication of sinusitis. We present two cases of non invasive maxillary sinusitis in immunocompetent patients relates to their occupation. It is unusual to have such an etiology and we note the importance of completeness of medical history, during the patient's examination.