Background: Efficacy of on-demand drugs for women with hypoactive sexual desire disorder or female sexual interest/arousal disorder (FSIAD) should be assessed using a validated instrument that assesses the discrete sexual events during which the on-demand drug is taken, because this type of assessment is more proximate to an on-demand drug's efficacy compared to instruments that assess sexual function over longer periods of time. Aim: The aim of this study was to assess the psychometric properties of the Dutch translation of the previously validated 11-item Sexual Event Diary (SED) for measuring sexual satisfaction and sexual functioning during discrete sexual events. Methods: Psychometric assessment was performed on data of 1,840 SEDs from 139 women with hypoactive sexual desire disorder/FSIAD, collected during a randomized clinical cross-over trial conducted in the Netherlands. Outcomes: Item scores of the SED at the event level, and at subject level, summarized item scores during the placebo run-in period (PRI) and active treatment period, and score changes from PRI to active treatment period. Results: Reliability and convergent validity were confirmed. All item scores showed the ability to discriminate between known groups. Larger mean score changes from PRI were observed in groups with known benefit from the medication, as compared to those with no benefit. Guyatt effect sizes ranged from 0.51–1.02, thereby demonstrating ability to detect change. Clinical Translation: The Dutch version of the SED is an excellent instrument for assessing female sexual functioning and sexual satisfaction during discrete sexual events and for assessing these concepts over longer periods of time. Conclusions: Data were collected in a randomized, well-controlled trial. The large number of data points gave high statistical power, and the results confirmed previous findings. However, care is needed when generalizing the SED's validity to other areas of research, eg, recreational drug use and sexual risky behaviors, since the ...