Usage of chemicals like urea formaldehyde and melamine urea formaldehyde as binders in wood-based panels has become more and more important of an issue as time goes by. Emission of carcinogenic formaldehyde in work places where they are manufactured and sold and later during usage as final products in houses, work places and schools threatens human health. Limits on formaldehyde emission based on legal obligation are imposed in European states, USA, and other developed countries and wood-based panels are certified with CARB,E1 certification systems. This study aims to measure formaldehyde emissions from melamine faced particle boards and fibreboards according to standards TS EN 717-1 and TS EN 717-2, determine the time of decrease of emission, explain hazardous effects of emission on human life and attract attention to this issue. As a result of this study, It is concluded that formaldehyde emission from melamine faced particle boards and fibreboards becomes stable in 10 days after chamber tests are started. It is determined that emission decreases after the third month and reaches minimum levels at the seventh month according to gas analysis method and that emission is easily effected from environmental conditions like temperature, moisture, ventilation and surrounding formaldehyde emitting products.