BACKGROUND: Care-seeking for sick children at the Ethiopian primary health care level is low. This problem may partly be due to unfavorable community perceptions of the quality of care provided. There is, however, limited knowledge on the quality of the clinical assessment and management provided by the health extension workers at the health posts. This study aimed to examine the quality of clinical assessment, classification and management provided to sick under-five children by health extension workers in four regions of Ethiopia. METHODS: Clinical observations of 620 consultations of sick children by health extension workers were conducted from December 2016 to February 2017. A clinical pathway analysis was performed to analyze whether sick children were appropriately assessed, classified and managed according to the integrated Community Case Management guidelines. RESULTS: Most sick children presented with complaints of cough (58%), diarrhea (36%), and fever (26%).Three quarters of children with respiratory complaints had their respiratory rate counted (74%, 95% CI 69-78), while a third (33%, 95% CI 27-40) of children with diarrhea were assessed for dehydration. Half (53%, 95% CI 49-57) of the sick children were assessed for general danger signs, while a majority (89%, 95% CI 86-92) had their arm circumference measured for malnutrition. Half of the sick children received some treatment and less than one-fifth were referred according to the integrated Community Case management guidelines. Comprehensive counseling was provided to 38% (95% CI 35-42) of the caregivers. CONCLUSION: The Ethiopian health extension workers' clinical assessment, classification and management of sick children did to a large extent not follow the clinical guidelines. This lack of adherence could lead to misdiagnoses and lack of potentially life-saving treatments.