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In order to study the effects of row spacing and plant density on the growth trend and dry weight yield of Chamomile flower (Matricaria Chamomilla) a field experiment was conducted at the research field of Zanjan University in 1998. This experiments was carried out in a split block design with two factors, each in RCB (randomized complete block) design. factor A was row spacing at three levels (30,40 and 50 cm) and factor B was plant spaces or plant spacing within the row (10,15 and 20 cm) each in three replications. Results indicated that decreasing in row spacing and increasing plant spacing within the row lead to an increase in dry weight yield of flower, planting arrangement of 30 10 cm with density of 333000 plant/ha had the highest dry weight yield of flower, there was a significant interaction between the two factors (P5%) for dry weight yield of flower and number of flower per plant but a non significant interactions was observed in the case of plant height