The Injustice Experience Questionnaire has shown promising ability to predict problematic rehabilitation in pain conditions, especially concerning work status. A Danish language version of the Injustice Experience Questionnaire was developed and completed by 358 patients with long-lasting pain/somatoform symptoms. These patients also completed questionnaires concerning sociodemographics, anxiety and depression, subjective well-being, and overall physical and mental functioning. Our results showed satisfactory interpretability and face validity, and high internal consistency (Cronbach’s alpha = .90). The original one-factor structure was confirmed, but subscales should be interpreted cautiously. The Danish version of the Injustice Experience Questionnaire is found to be valid and reliable.