We attempted a psychometric validation of a Polish-language version of the Comic Style Markers questionnaire (CSM). A sample of 1785 adult Polish participants completed a Polish translation of the CSM (CSM-PL), the HSQ, and the IPIP-BFM-20. A self-other correlation analysis was carried out on 116 Polish university students. Exploratory and confirmatory factor analyses of several models have shown a six-factor, 33-item solution to have good model fit, with the lighter comic styles (benevolent humor, fun, nonsense, and wit) retained and the darker comic styles merging into cynicism and a new factor of mocking humor. The CSM-PL achieved satisfactory reliability and measurement invariance. We also present preliminary evidence suggesting validity in terms of correlations with age and gender, humor styles, Big Five personality traits, and self-other correlations. Nevertheless, the CSM-PL should be employed in further studies to confirm its validity