The objective of the present study was to estimate the results of primary tympanoplasty of extended tympanic defects in the patients presenting with chronic mesotympanitis. The results of the surgical treatment of 68 patients with chronic suppurative otitis media (mesotympanitis) by primary tympanoplasty of extended tympanic defects. Tympanoplasty was performed with the use of a 0.2-0.3 mm cartilage plate from which a number of fragments mobile relative to one another were formed by an original method. Good clinical and anatomical results were obtained in 90.4% of the treated patients within 24 months after surgery. Moreover, the number of patients with socially adequate hearing increased up to 86.5% during the same period. The bone-air interval was reduced from 30 to 10 dB at all observation time-points.