Objectives: to evaluate the care practice adopted by nursing technicians before, during and after peripheral intravenous catheterization performed in hospitalized children. Methods: cross-sectional and descriptive research, carried out in a pediatric hospital in Bahia through non-participatory observation of peripheral intravenous catheterizations performed in children by nursing technicians. Data was collected through an instrument containing care related to the moments before, during and after insertion of the catheter, calculating absolute and relative frequencies, measures of central tendency and dispersion. Results: there were 31 nursing technicians, who performed care mainly before intravenous catheterization. Nonconformities were identified regarding hand hygiene, use of a disposable mask, selection of the catheter insertion site, antisepsis, stabilization and catheter coverage. Conclusions: most of the precautions observed regarding peripheral intravenous catheterization are not in accordance with the standards of practice recommended by the national and international literature.