In recent years, more and more researchers have focused on studies of children with autism spectrum disorder (ASD), however, studying their siblings has gained less scientific interest. The present study focuses on siblings of children with ASD and assesses their characteristics in terms of emotional intelligence and empathy. Our sample consisted of n = 61 children in two age groups studied: 6-8 and 10-15 years old. Our experimental group consisted of n = 30 siblings of children with ASD, while our control group also consisted of n = 31 children with sibling relationships. Subjects completed two paper-and-pencil tests: the Reading the Mind in the Eyes Test (Children’s Version), and depending on the age group, the Emotional Intelligence Test (EIT 6-8 / EIT 10-15). We identified higher emotional intelligence and empathy in higher age groups. Among 6-8 years old siblings of children with ASD, higher scores were found to be. At the level of gender differences, girls performed more outstandingly in the tests examined. In our study, the 6-8 years old siblings of children with ASD can be characterized by a higher degree of emotional intelligence and empathy, however, we cannot draw conclusions in a representative way for the entire population.