Background: The recovery process of a psychiatric patient is related to his primary informal caregiver's style of coping with stress. There is insufficient literature on validations of instruments that measure coping styles in this population. Objective: To adapt and validate a scale to measure coping strategies in primary informal caregivers. Method: The adapted scale was based on the Extreme Coping Scale of López‐Vázquez and Marván. Items from that scale were adapted for application to informal caregivers.