I investigate the links between the part-time employment opportunities and the labour supply adjustments of older workers, focusing on both the extensive and intensive margins. Utilising data for 30 European countries in the period from 2011 to 2021, I construct a quasi-panel that compares individuals aged 60–64 with those aged 55–59 from five years prior. I find that the employees in sectors offering more part-time jobs are more likely to stay in employment, and that the total hours worked by these employees decrease at a slower rate than those of the employees in sectors imposing more rigid hours constraints. These results are most pronounced for women in manual types of occupation, but are significant across almost all examined worker categories. The positive relationship between the part-time employment opportunities and the total hours worked of older employees is robust to various modifications in the empirical setup. However, this relationship is heterogeneous across countries, and is least pronounced in the countries with a high availability of part-time jobs.