Dial caliper

The utility model discloses a dial caliper, a dial depth caliper and a dial height caliper. The caliper comprises a frame, a main body arranged inside the frame and an indicator fixedly connected with the frame, wherein a rotary gear is arranged inside the indicator, teeth are arranged on the main body and meshed with the gear, and the frame can move relative to the main body. The teeth are positioned on the longitudinal side part of the main body, or longitudinal grooves or longitudinal ridges are arranged on the front surface of the main body, and the teeth are positioned at the longitudinal marginal part of the grooves or the ridges. Since the teeth on the main body are stably meshed with the gear on the frame, the frame moves on the main body more smoothly with better hand-feeling. The dial caliper has the advantages of more reliable operation and higher indicating accuracy.