A PESTICIDAL COMPOSITION COMPRISING [2,5- DIOXO-3-(2-PROPYNYL)-1-IMIDAZOLIDINYL]METHYL 3-(2- METHYL-1-PROPENYL)-2, 2-DIMETHYLCYCLOPROPANECARBOXYLATE AND 4-METHOXYMETHYL-2,3,5, 6-TETRAFLUOROBENZYL 3-(2- CYANO-1-PROPENYL) -2, 2-DIMETHYLCYCLOPROPANECARBOXYLATE AS ACTIVE INGREDIENTS, AND A PESTS-CONTROLLING METHOD CHARACTERIZED BY APPLYING AN EFFECTIVE AMOUNT OF SAID PESTICIDAL COMPOSITION TO THE PESTS OR A LOCUS WHERE THE PESTS INHABIT, HAVE AN EXCELLENT CONTROLLING EFFECT ON THE PESTS.