Head injury frequently produces physical and psychological sequelae involving cognitive, behavioural, and personality disturbances which are chronic and perhaps even permanent. Clinically, it is apparent that the marital relationships of head injury patients face initial disruption as well as ongoing challenges in dealing with the physical, neuropsychological, and emotional changes post-injury. However, there is little empirical data to substantiate these observations. In this study, the marital relationships of 55 male head injury patients were assessed, based on the spouse's self-report obtained through interview and questionnaires. The sample was divided into three groups according to the severity of the injury: mild (N = 10), moderate (N = 25) and severe (N = 20). Based on a one-way multivariate analysis of variance, dyadic consensus, affectional expression, and overall dyadic adjustment were significantly lower for wives in the severe group than the moderate group. Affectional expression was also lower in the severe group than the mild group. Stepwise multiple regression analysis determined that 47% of the variance of overall dyadic adjustment could be accounted for by three variables (multiple R = 0.69, p less than 0.001). Dyadic adjustment was greater when wives reported a lower level of financial strain, perceived their spouse to have a relatively low level of general psychopathology or maladjustment, and when the injury was relatively mild based on GCS scores. The implications for intervention in rehabilitation at the marital level are highlighted.