Problems on nutrition deficiencies can occur in all age groups, including in school-aged children (6-12 years old). Families who live in slums were more likely to fail to meet the nutritional needs as well as unhygienic practice may increase the risk of infectious diseases. The purpose of this study was to determine the relationship between stunting and learning achievement of primary school children in slum areas in Central Jakarta. This study was an observational study with cross sectional design. Data were collected between June to November 2012 from students in six elementary schools of Kramat and Tanah Tinggi Sub-districts. Data collected were basic characteristics, hemoglobin (Hb) level, anthropometry, concentration score, learning achievement and food recall 1x24 hours. Respondents were 141 children consist of 86 girls (61%) and 55 boys (39%). Stunting proportion was 21.5% based on the screening measurement. Bivariate analysis revealed there was a relationship between HAZ (stunting indicator) and learning achievement of school-aged children.