Nowadays the number and range of laparoscopic procedures is quickly increasing and contraindications are limited. But laparoscopic operations cannot be performed in every case, what leads to conversion.The aim of the study was to present the conversion rates and reasons in different types of laparoscopic procedures, both emergency and elective.Material and methods. 7685 patients operated laparoscopically in the 2nd Department of General Surgery of the Jagiellonian University between 1993 and 2008 were included in the study. Minimally invasive approach was used at the beginning in 608 patients with acute appendicitis (average age = 28,4 years), in 101 patients with perforated peptic ulcer (average age = 46.4 years), in 236 patients who underwent splenectomy (average age = 41 years), in 166 patients who had adrenalectomy (average age = 53 years), in 117 patients who underwent Nissen fundoplication (average age = 44,4 years), in 834 individuals who had inguinal hernia repair (average age = 49.4 years), in 5311 who had cholecystectomy (average age = 52.1 years and in 212 patients who underwent other procedures.Results. The conversion rates in the analyzed period were 2.88% in whole material, in case of appendectomy 3,95%, perforated ulcer operation 19,80%, splenectomy 2.12%, adrenalectomy 1.81%, Nissen fundoplication 1.71%, inguinal hernia repair 0.96% and cholecystectomy 2.92%. Emergency surgery was related to higher (4.98%) conversion rate than elective procedures (1.88%). Most frequently convestions were related to technical reasons (2,48%), than enforced by complications (0.41%).Conclusion. Most conversions were caused by technical reasons, not complications. The change of the approach from laparoscopic to open one was more frequent in case of emergency procedures.