Abstract: A desktop double-sided adhesive tape dispenser includes a main body formed with a lengthwise opening and fixed inside with a fundamental plate provided with a guide rail at a location of the lengthwise opening. The fundamental plate is disposed with a tape-winding unit containing a first fixing shaft and a second fixing shaft positioned side by side. The first fixing shaft is pivotally fitted with a withdrawing gear having a withdrawing reel pivotally fitted thereon, while the second fixing shaft is pivotally fitted with a driving gear engaged with the withdrawing gear and pivotally fitted with a driving reel having a double-sided adhesive tape fitted thereon. Further, the fundamental plate is disposed with a tape-conveying wheel in front of the guide rail. The double-sided adhesive tape dispenser can be placed on a desktop for use, needless to be held with hands.