An anual distribution of the number of asthma attacks for a period of 10 years is show in this work.The following results were obtained through statistic proccesing and graphic interpretation of the number of cases of attacks in the Medical center in Bitola and their integration with meteorological data from the Hidrometeorological institute of Macedonia for the same period as well as data on the percentage on the ground of certain forest families around the city received from the Forest Economy. A primari maximum nas been registered of the asthma attacks in the winter months which appears as a consequence of increased humidity of air, the low temperatures and the frequend temperature inversion which contribute to the increased air polution. A secondary maximum appears in the spring month. Special care was dedicated to the pollen of pine and molica,which are most frequent and take up an area of 6582 ha,northwest of the sity. In the month of May and June during the blossoming of the pine,and in the days of north-western wind when this pollen is most present in the air, frequent attacks have not been registered. Becouse of this we firmly state that the pollen from pine and molika do not have an ethiological influence upon these patientes.