To secure high precision for reference measurement with minimum cost and ease, by placing a reference object away from a polarizing device by a specified distance, and constituting the reference object with a triple element comprising mirrors placed at a specific angle each other.

A laser distance measuring equipment 10 comprises a pulse laser 12, polarizing device 14, photo-detecting unit 16 and a reference object 18 placed away from the polarizing device 14 by a specified distance. Driven with a motor, rotation motion around a vertical axis 24 is continuously performed. A rotatable mirror 26 comprises such rotation position as the light is diverted to the reference object 18. The rotatable mirror 26 is so aligned, during range finding, that the light is diverted to a measurement region 4 through a front plate 40. The reference object 18 comprises plural triple elements, while each triple element comprises mirror surfaces placed at 90° each other. The light returns, through reflection, from the reference object 18 is incident in parallel on a reception lens 50, thus a clear image is generated at a focal point.