Literature to date has well supported the detrimental consequences of bullying and school
exclusion in different countries, with negative outcomes in school adjustment or child psychological
adjustment, among others. However, more research is needed to understand the effects on positive
indicators of psychological well-being in children as subjective happiness. Cross-national studies
are also recommended to examine the differential effects by country. Thus, the aim of this study
was to examine bullying and school exclusion, and their effects on child subjective happiness, from
a cross-national perspective. Data from the Second Wave of Children’s Worlds: International Survey
of Children’s Well-being (ISCWeB) was used, from a sample of 12,623 children aged 10 years old
from 15 countries. Participants completed self-report measures of bullying, school exclusion and
subjective happiness. Results showed that 20.8% of children suffered harassment and 17.6% felt
excluded, twice or more times, at school. Negative effects of bullying and exclusion on subjective
happiness were observed in all the sample. Furthermore, differences by country were found in the
frequency of bullying and exclusion, as well as in the size of their effects on happiness. These results
underline the need to protect child psychological well-being by preventing bullying and school
exclusion.