A portable data collector having scan buttons pressed by forefinger to input merchandise information and scan merchandise barcode includes a shell body having a top face and a bottom face corresponding to the top face; a circuit board installed in the shell body; a plurality of input buttons arranged on the top face for actuating the scan component to generate scan light to read barcode and electrically connected to the circuit board; a display screen also arranged on the top face of the shell body and electrically connected to the circuit board; a scan component additionally arranged in the shell body and electrically connected to the circuit board; and a scan button shown as a trigger shape and arranged on the bottom face of the shell body to be electrically connected to the circuit board; thereby, when the scan button is pushed by forefinger, the scan component is actuated.