An image pickup apparatus, comprising: a measurement section configured to measure a reception light amount in each of a plurality of light reception regions to generate a measurement result; a counting section configured to count a count value in synchronism with a given clock signal; a photodiode (243, 363, 383) configured to generate charge according to the reception light amount; a comparator configured to compare a given ramp signal and a voltage according to an amount of the charge with each other and output a result of the comparison as a comparator output signal; a selection section configured to select one of a plurality of exposure periods different from each other based on the measurement result in each of the plurality of light reception regions; a digital signal generation section configured to perform exposure for each of the plurality of light reception regions over the selected exposure period to generate a digital signal, wherein the digital signal generation section retains, in a case where the comparator output signal is inverted, the count value as the digital signal; and an image processing section configured to adjust a value of the digital signal generated for each of the plurality of light reception regions based on the measurement result, wherein the measurement section decides whether or not the reception light amount is higher than a given value and generates and retains a decision flag indicative of the decision as the measurement result, and the measurement section includes a decision flag generation section (262, 301, 368) configured to compare the count value and a given set value according to the given value with each other and output a result of the comparison as a latch input signal, and a decision flag retention section (247, 267) configured to retain, in the case where the comparator output signal is inverted, a value of the latch input signal as the decision flag. a measurement section configured to measure a reception light amount in each of a plurality of light reception regions to generate a measurement result; a counting section configured to count a count value in synchronism with a given clock signal; a photodiode (243, 363, 383) configured to generate charge according to the reception light amount; a comparator configured to compare a given ramp signal and a voltage according to an amount of the charge with each other and output a result of the comparison as a comparator output signal; a selection section configured to select one of a plurality of exposure periods different from each other based on the measurement result in each of the plurality of light reception regions; a digital signal generation section configured to perform exposure for each of the plurality of light reception regions over the selected exposure period to generate a digital signal, wherein the digital signal generation section retains, in a case where the comparator output signal is inverted, the count value as the digital signal; and an image processing section configured to adjust a value of the digital signal generated for each of the plurality of light reception regions based on the measurement result, wherein the measurement section decides whether or not the reception light amount is higher than a given value and generates and retains a decision flag indicative of the decision as the measurement result, and the measurement section includes a decision flag generation section (262, 301, 368) configured to compare the count value and a given set value according to the given value with each other and output a result of the comparison as a latch input signal, and a decision flag retention section (247, 267) configured to retain, in the case where the comparator output signal is inverted, a value of the latch input signal as the decision flag.