Easily accessible chest and skeleton roentgen examinations are needed in primary health care. In Finland the health centres perform about a third of all roentgen examinations. Many of the films are interpreted by health centre doctors at least in the primary phase. About 40% of them are chest radiographs. In 2640 chest radiographs interpreted by general practitioners the final roentgen diagnosis was pathological in 54%. Pathological conditions were totally overlooked in 13%. Of normal cases 19% were interpreted falsely positive. The greatest need for general practitioners' training is in the common findings in the chest, for example cardiac insufficiency and inflammatory as well as atelectatic changes in the lungs. Pulmonary findings in children proved difficult to interpret and were proposed as a subject for training. The role of poor image quality in interpretation errors must be emphasized when less experienced doctors interpret chest films. If regular radiological consultation is not available, postgraduate training in diagnostics of chest radiographs should be considered in the training of specialists in general practice as well as in their supplementary training.