The Mindfulness in Parenting Scale – Infant Version (MPS-I) is an adaptation of the Interpersonal Mindfulness in Parenting Scale (IMPS), which assesses mindful parenting among parents of infants aged between 0 and 12 months. It consists of 28 items rated on a 5-point Likert scale and measures the following five mindful parenting dimensions: Listening with Full Attention, Emotional Awareness of the Child, Compassion for the Child, Self-Regulation in Parenting, and Nonjudgmental Acceptance of Parental Functioning. A confirmatory factor analysis revealed that these five mindful parenting dimensions are related but distinct constructs. The MPS-I subscales and total score have adequate reliability (with the exception of the Emotional Awareness of the Child subscale, which has a lower Cronbach’s alpha) and construct validity, correlating negatively with anxiety and depression symptoms as well as with emotion dysregulation. The MPS-I was also shown to distinguish between mothers with clinically significant levels of depression and anxiety from those with normal levels. As the MPS-I is a relatively recent version of the IMPS and its psychometric properties have only been studied in the Portuguese population, further research is needed to better explore its psychometric properties and adequacy in different populations.