A component mounter for mounting electronic components arranged on a tray placed on a pallet of a tray-type component supply device on a circuit board by picking up the electronic components with multiple suction nozzles provided on a mounting head in such a manner as to be lifted up and lowered, wherein multiple trays are placed to be aligned on the pallet, wherein the mounting head is configured such that at least two suction nozzles in the multiple suction nozzles are lowered simultaneously so as to pick up at least two electronic components simultaneously, and wherein a control device configured to control electronic component pickup and mounting operations causes the mounting head to move so as to position the at least two suction nozzles that are lowered simultaneously in an electronic component pickup operation step to be located individually on the at least two trays on the pallet, causes the at least two suction nozzles to be lowered simultaneously, and causes the electronic components on the at least two trays to be picked up simultaneously, wherein the number of the suction nozzles that are simultaneously lowered is two, and wherein the pallet is made capable of adjusting a position of at least one tray of two adjacent trays so that an interval defined between two electronic components that are individually located on the two adjacent trays to be picked up simultaneously matches an interval (α) defined between the two suction nozzles that are simultaneously lowered, wherein the pallet comprises an interval display section including a guide to the interval (α) measured by an operator in performing an operation of adjusting the position of the at least one tray of the two adjacent trays so as to match the interval (α) 1. wherein multiple trays are placed to be aligned on the pallet, wherein the mounting head is configured such that at least two suction nozzles in the multiple suction nozzles are lowered simultaneously so as to pick up at least two electronic components simultaneously, and wherein a control device configured to control electronic component pickup and mounting operations causes the mounting head to move so as to position the at least two suction nozzles that are lowered simultaneously in an electronic component pickup operation step to be located individually on the at least two trays on the pallet, causes the at least two suction nozzles to be lowered simultaneously, and causes the electronic components on the at least two trays to be picked up simultaneously, wherein the number of the suction nozzles that are simultaneously lowered is two, and wherein the pallet is made capable of adjusting a position of at least one tray of two adjacent trays so that an interval defined between two electronic components that are individually located on the two adjacent trays to be picked up simultaneously matches an interval (α) defined between the two suction nozzles that are simultaneously lowered, wherein the pallet comprises an interval display section including a guide to the interval (α) measured by an operator in performing an operation of adjusting the position of the at least one tray of the two adjacent trays so as to match the interval (α) 1.