A vascular clamp for use in minimally invasive surgery includes a positioning member having a first side and a second side opposite to the first side and looping/tightening member and a reinforcing member. The positioning member includes a through-hole, a positioning hole, and a connection gap intercommunicating the through-hole with the positioning hole. Each of the through-hole, the positioning hole, and the connection gap extends from the first side through the second side of the positioning member. The looping/tightening member includes a connection end and a free end. The connection end is connected to the positioning member. The looping/tightening member includes a positioning section having a plurality of engagement blocks. A neck is interconnected between two adjacent engagement blocks. One of the engagement blocks is selectively and removably engaged in the positioning hole. The reinforcing member is mounted between the first and second sides of the positioning member.