Abstract: An insecticidal composition containing as an active ingredient an insecticidally effective amount of 10 to 30 % by weight of (+)-cis- and 70 to 90 % by weight of (+)-trans-chrysanthemate of the formula ##EQU1## wherein R is ##SPC1##In which R.sub.1 is an allyl or propargyl group, R.sub.2 is a propargyl, benzyl or phenoxy group, R.sub.3 is a hydrogen atom or a methyl group, R.sub.4 is a hydrogen atom or an ethynyl group and Y is an oxygen atom or --CH=CH-- group; andAn insecticidal composition containing as an active ingredient an insecticidally effective amount of (a) at least one of above-mentioned (+)-cis,trans-chrysanthemates having said cis to trans ratio and (b) at least one of chrysanthemates prepared from a chrysanthemic acid having a cis to trans ratio different from that of the (+)-cis,trans-chrysanthemic acid moiety of the above formula (I) and an alcohol moiety of the above formula (I) having a structure different from that of the alcohol moiety of the (+)-cis,trans-chrysanthemates of above (a).