Elastic net cap

The utility model discloses an elastic net cap which comprises an elastic net cap body, rope sleeves arranged on the two sides of the elastic net cap body and movable ropes penetrating out of the rope sleeves, and the two movable ropes are combined together and sleeved with a tightness adjusting mechanism. The elastic net cap body can be sleeved on the head, the two movable ropes penetrate through the inside of the movable block, the two movable ropes are sleeved on the ears, and the movable block is pushed to move on the movable ropes, so that the length of the upper part of the movable rope can be shortened, the tightness of the elastic net cap body can be adjusted, and the movable block can be pushed to a proper position. A pressing plate is tightly jacked through a connecting spring, so that the pressing plate acts pressure on a movable rope, a movable gear is rotated through a rotating handle to push two movable racks to move, and the end parts of the movable racks are inserted into insertion holes in th