Objective: The barbed suture has been around for some time with some important theoretical advantages for tendon repairs such as resistance to suture slippage and knotless application. However, these theoretical advantages are not yet proven to be practically important. The literature on the barbed suture for tendon repair has a focus on in-vivo or ex-vivo preclinical investigations of established tenorrhaphy methods. Current literature is poor in knowledge on its fundamental properties thus basic research. Our study attracts attention on the lack of basic research on barbed suture for tendon repair and investigates a barbed suture's linear frictional performance in the tendon.