A laser radar system, comprising: a laser light source for generating pulse laser light based on a trigger signal and outputting the pulse laser light as a transmitting pulse; a scanner for transmitting the transmitting pulse toward a target while two-dimensionally scanning a pencil-shaped transmitting beam of the transmitting pulse in a long-side direction of a light-receiving element and in a direction orthogonal to the long-side direction of the light-receiving element, and outputting scan angle information; a lens of the receiver for receiving received light which has arrived after the transmitting pulse has been scattered by the target; a high aspect photo detector array for converting the received light into received signals each formed of an electrical signal domain, the high aspect photo detector array comprising a plurality of elements forming the array, each of the elements being configured to output one of the received signals, wherein the elements of the high aspect photo detector array are long light-receiving elements arrayed in the direction orthogonal to the long-side direction of the light-receiving element, wherein the long light-receiving elements provide a wide line-shaped field of view; a transimpedance amplifier array comprising respective elements for amplifying the signals received from the respective elements of the high aspect photo detector array and for outputting the amplified signals; an adder circuit for adding the amplified signals received from each element of the transimpedance amplifier array to obtain one output signal, the adder circuit transmitting the output signal to the distance detecting circuit; a distance detecting circuit for measuring a light round-trip time to the target of the output signal from the adder circuit; and a signal processing unit for causing the scanner to perform a two-dimensional scanning operation in association with the scan angle information, to thereby determine distances to multiple points on the target based on the light round-trip time and a speed of light and measure a three-dimensional shape of the target. a laser light source for generating pulse laser light based on a trigger signal and outputting the pulse laser light as a transmitting pulse; a scanner for transmitting the transmitting pulse toward a target while two-dimensionally scanning a pencil-shaped transmitting beam of the transmitting pulse in a long-side direction of a light-receiving element and in a direction orthogonal to the long-side direction of the light-receiving element, and outputting scan angle information; a lens of the receiver for receiving received light which has arrived after the transmitting pulse has been scattered by the target; a high aspect photo detector array for converting the received light into received signals each formed of an electrical signal domain, the high aspect photo detector array comprising a plurality of elements forming the array, each of the elements being configured to output one of the received signals, wherein the elements of the high aspect photo detector array are long light-receiving elements arrayed in the direction orthogonal to the long-side direction of the light-receiving element, wherein the long light-receiving elements provide a wide line-shaped field of view; a transimpedance amplifier array comprising respective elements for amplifying the signals received from the respective elements of the high aspect photo detector array and for outputting the amplified signals; an adder circuit for adding the amplified signals received from each element of the transimpedance amplifier array to obtain one output signal, the adder circuit transmitting the output signal to the distance detecting circuit; a distance detecting circuit for measuring a light round-trip time to the target of the output signal from the adder circuit; and a signal processing unit for causing the scanner to perform a two-dimensional scanning operation in association with the scan angle information, to thereby determine distances to multiple points on the target based on the light round-trip time and a speed of light and measure a three-dimensional shape of the target. an adder circuit for adding the amplified signals received from each element of the transimpedance amplifier array to obtain one output signal, the adder circuit transmitting the output signal to the distance detecting circuit; a distance detecting circuit for measuring a light round-trip time to the target of the output signal from the adder circuit; and a signal processing unit for causing the scanner to perform a two-dimensional scanning operation in association with the scan angle information, to thereby determine distances to multiple points on the target based on the light round-trip time and a speed of light and measure a three-dimensional shape of the target.