A printing operation assisting device for assisting a printing operation performed by a solder printer configured to print a solder cream on a substrate surface, including: a measure determining portion configured to determine a remedial measure against a deterioration of a print quality specified on the basis of print-result information obtained from an inspecting machine configured to inspect a print result by the printer, in accordance with a kind of the print-quality deterioration; and a measure issuing portion configured to issue a command relating to the remedial measure determined by the measure determining portion to at least one of the printer and its operator, wherein the measure determining portion is configured to determine a remedial measure against a certain print-quality deterioration and to redetermine another remedial measure different from the previously determined remedial measure where the deteriorated print quality is not improved by execution of the previously determined measure.