A Abstractindonesia and the netherlands are countries that adopt the civil law legal system. based on the similarities between the legal systems of the two countries, the author examines a comparative analysis of the investigation process in narcotics-related criminal offenses in indonesia and the netherlands. therefore, this research addresses the following research questions: (1) how is the investigation process for narcotics-related criminal offenses regulated in indonesia and the netherlands, and what are the similarities and differences between the two countries? (2) what are the strengths and weaknesses of the narcotics criminal investigation systems in indonesia and the netherlands?this research employs a normative juridical research method with a descriptive approach. the data used in this research consist of secondary data, collected through library research and analyzed using qualitative data analysis. conclusions are drawn using a deductive method. the results of this research indicate that both indonesia and the netherlands grant law enforcement investigators the authority to employ coercive measures in handling narcotics-related criminal offenses. however, indonesia places greater emphasis on the effectiveness of law enforcement through broad investigative powers and the involvement of the national narcotics agency (bnn), whereas the netherlands places greater emphasis on judicial oversight and the protection of human rights. the indonesian system is superior in terms of the effectiveness of detecting and uncovering narcotics-related criminal offenses, while the dutch system is more advanced in terms of coordination, oversight, and the protection of human rights throughout the investigation process.