Background: Patient safety is an indicator of health service quality that becomes an important issue although data of patient safety incident at primary health care are not always accurate in Indonesia. Public health center is a health service facility that implements patient safety to improve the health service quality as stated in Health Ministry Law Republic of Indonesia Number 36 Year 2009.Aim: The aim of this study was to identify the implementation of patient safety to improve the service quality.Method: Data collection techniques used were observation, interview, and literature study. The research was done at a public health center in Surabaya from January to February 2018.Results: The results showed that the implementation of patient safety at the public health center was adjusted to the accreditation standard of the public health center. However, there are still some obstacles and shortcomings in the fulfillment of patient safety standards, so it is necessary to optimize the implementation of patient safety from all stakeholders.Conclusion: It can be concluded that public health centers should provide safe and qualified services to achieve healthy disctrict. The public health centers also need to improve the patient safety according to Health Ministry Law Republic of Indonesia Number 36 Year 2009.Keywords: health service quality, patient safety, public health center