Personal hygiene is someone’s effort to keep his or her cleaning to get physically and psychologically safety.<br />Hand washing is one of healthy behavior, generally this behavior has been known to the children since they<br />were young, not only from the parents at home, and moreover it becomes children’s daily routine. The<br />purpose of this research is to know the influence of personal hygiene elucidation to the hand washing<br />behavior of school aged children at Banjardowo 2 State Elementary school in Kabupaten Jombang.<br />Research design is one group pre-post test. The population is 69 repondents from students in 4th, 5th, and<br />6th grade at Banjardowo 2 State Elementary school Kabupaten Jombang with 41 respondents as a sample.<br />Sampling used is stratified random sampling. Variable Independent is elucidation of personal hygiene.<br />Variable Dependent is hand washing behaviour. Frequency of hand washing behaviour before elucidation is<br />less than 21 respondents (51,2%) and hand washing behaviour after elucidation is good with 23 respondents<br />(56,1%). From Wilcoxon test we get score p = 0,000 &lt; α (0,05) so H1 is accepted. From the result of data<br />analysis show that there is an influence between personal hygiene to the the influence of personal hygiene<br />elucidation to the hand washing behavior of school aged children at Banjardowo 2 State Elementary school<br />Jombang.