Provided are a surgical small pad and a blood vessel tape which enable a reduction in the possibility of damaging internal organs and hold water absorbability and pliability, and a thread used therefor. This thread is characterized by being configured by braiding a plurality of covered yarns each formed by winding a coating fiber around a core thread produced from a filament containing a radiopaque substance. The core thread can be configured by bundling a plurality of polypropylene filaments, and the coating fiber can be produced from polyethylene terephthalate. This surgical small pad is characterized by being provided with a water-absorbing pad main body formed by stacking a plurality of nonwoven fabrics, and in that the thread is welded onto the pad main body.
