A solid-state imaging device comprising an imaging photodetecting section where MxN pixel units P 1,1 to P M,N are two-dimensionally arrayed in M rows and N columns, a trigger photodetecting section including a trigger photodiode that generates charge of an amount according to an incident light amount, a trigger data output section that outputs trigger data according to an amount of charge generated in the trigger photodecting section, and a control section that controls operation of each pixel unit P m,n of the imaging photodetecting section, wherein each pixel unit P m,n includes a photodiode that generates charge of an amount according to an incident light amount, a first charge accumulating section that accumulates a charge generated in the photodiode, a second charge accumulating section to which a charge accumulated in the first charge accumulating section is transferred, a first initializing section that initializes charge accumulation in the first charge accumulating section, a second initializing section that initializes charge accumulation in the second charge accumulating section, a transfer section that transfers a charge accumulated in the first charge accumulating section to the second charge accumulating section, and an output section that outputs pixel data according to an amount of charge accumulated in the second charge accumulating section to a wiring line L n, and the control section judges a start and end of a light incidence based on trigger data output from the trigger data output section, when judging a start of light incidence the control section ends an initializing operation by the first initializing section and starts a charge accumulating operation by the first charge accumulating section simultaneously for the MxN pixel units P 1,1 to P M,N of the imaging photodetecting section, and then, when judging an end of light incidence, sequentially for each row of the imaging photodetecting section, for each pixel unit P m,n, the control section ends an initializing operation by the second initializing section and causes a charge transferring operation by the transfer section and a data outputting operation by the output section to be performed, where M and N are each an integer not less than 2, m is an integer not less than 1 and not more than M, and n is an integer not less than 1 and not more than N, and wherein when an absolute value of trigger data output from the trigger data output section has changed into a state of being in excess of a first threshold from a state of being less than the first threshold and then the state where the absolute value of the trigger data is in excess of the first threshold has continued for a predetermined time τ 1 or more, the control section judges it as a start of a light incidence, and when an absolute value of trigger data output from the trigger data output section has changed into a state of being less than a second threshold from a state of being in excess of the second threshold, and then a state where the absolute value of the trigger data is not in excess of the second threshold has continued for a predetermined time τ 2 or more, the control section judges it as an end of a light incidence, and τ 2 is ten times or more longer than τ 1.