Abstract: A tamper resistant guard for protectively covering a patient's infusion site while allowing visual inspection of the site without manipulation of the guard. A resilient base panel includes an open portion therein that is positioned over the infusion site, allowing visual inspection of the dermal tissue proximal of the site for indications of infiltration and extravasation of medications and degeneration of dermal tissues proximal to the infusion site. A resilient flap having a flexible window therein is hingedly secured to the base panel with the window positioned in register with the panel open portion, to facilitate visual inspection of the infusion site without flap manipulation. The flexible window is positioned in covering relationship over the infusion site and includes means for fastening a flap attaching side in overlapping orientation to secure infusion tubing between the flap and base panel, thereby preventing patient tampering with the tubing and the infusion site.