From 1999 to 2002 81 transthoracic fine-needle lung biopsies (TFNB) were performed with use of linear transducer (3.5 MHz) and bioptic channel, monitored ultrasonographically. The procedure was applied in 70 patients with peripheral lesions on chest X-ray or CT, which needed histopathological examination. Our study showed that linear transducer with bioptic channel is useful in monitoring needle path and material aspiration during transthoracic fine-needle biopsy. Application of this equipment makes the procedure safe for patients and the percentage of observed complications is low. Specificity and sensitivity of the procedure is comparable to other imaging techniques.