The Peripheral Intravenous Insertion Confidence Assessment for short peripheral catheters is a 10-item, 5-point Likert scale, self-administered tool to measure a person's confidence in his or her personal intravenous insertion skills, including site selection and assessment, procedure, dressing, and documentation. Expert opinion validity was obtained from a panel of 3 infusion therapy leaders. Two-day test-retest reliability and internal consistency were determined using 22 practicing nurses. Individual question correlations ranged from r = 0.93 to 0.16, and the total score correlation was r = 0.96. Using first-test results only, internal consistency was 0.85 (α = 0.85, n = 22). Overall, the insertion confidence assessment is valid and, in the present study, a reliable tool to measure the short peripheral catheter insertion confidence of staff nurses.