One of the main problems nowadays, are big amounts of various waste that ends up in the sea. It is estimated than 80% of the waste occurs as a result of human activity on land, while the other 20% being the result of irresponsible sea transport, tourism and fishing industry. The presence of the waste diminishes the value of our protected areas, one example being the Kornati National park. It is considered that a significant amount of the collected driftwood occurred on the territory of the national park itself, while the majority comes with the currents from southern Adriatic - Ionian regions. Qualitative and quantitative analysis of the collected waste is required, in order to have an impact on reducing the number of waste, which gets into the sea, and minimize the negative effects on nature and the environment. This paper analyzes the composition of the collected bulk waste in Lojena bay (Levrnaka Island) during 2018. and 2019. The results of the research will be used by the Public Institution "National Park Kornati" in defining the necessary measures for the purpose of protecting natural values. In April 2018, we analyzed the collected waste in Lojena Bay, which recorded a total of 1441 pieces of different waste with the weight of 38.49 kg, while a total of 599 pieces of different waste, total mass 1.95 kg, were collected in April 2019. The most widely-used category of bulk waste for both research periods in the Lojena bay is plastic. It is necessary to continue with the actions of removing marine litter but also to work on prevention through the establishment of education and awareness programs aimed at visitors and their behavior as well as the local population.