A maintenance management device of a component mounting machine (31 to 34), the maintenance management device being configured to individually manage maintenance times at which to perform maintenance and to perform guidance of reaching the maintenance times using, as management targets, a plurality of constituent elements which are equipped in an exchangeable manner to a plurality of equipment positions of one or more component mounting machines (31 to 34) which are configured to mount electronic components onto a board and to operate, the maintenance management device comprising: a remaining operation number calculating section which, for the plurality of constituent elements , is configured to use an upper limit value of an operation number recommended in an interval period of the maintenance as a defined operation number (Nk, Mk), to use a number of operations since the previous maintenance as an actual operation number (Nm, Mm), and to calculate a remaining operation number (Nr, Mr) of each of the constituent elements based on the defined operation number (Nk, Mk) and the actual operation number (Nm, Mm); an operation frequency ascertaining section which is configured to ascertain respective operation frequencies (n, m) of the constituent elements at the plurality of equipment positions based on production job data corresponding to a type of the board; and a guide section which is configured to perform guidance of equipment positions of the two or more constituent elements based on the remaining operation numbers (Nr, Mr) and the operation frequencies (n, m) when the two or more constituent elements are equipped as a result of a change in the type of the board, or, as a result of a portion of the constituent elements which are equipped to the equipment positions reaching the maintenance time, wherein the guide section is configured to perform guidance to equip the constituent elements with small remaining operation numbers (Nr, Mr) to equipment positions with low operation frequencies (n, m), and to equip constituent elements with large remaining operation numbers (Nr, Mr) to equipment positions with high operation frequencies (n, m). a remaining operation number calculating section which, for the plurality of constituent elements , is configured to use an upper limit value of an operation number recommended in an interval period of the maintenance as a defined operation number (Nk, Mk), to use a number of operations since the previous maintenance as an actual operation number (Nm, Mm), and to calculate a remaining operation number (Nr, Mr) of each of the constituent elements based on the defined operation number (Nk, Mk) and the actual operation number (Nm, Mm); an operation frequency ascertaining section which is configured to ascertain respective operation frequencies (n, m) of the constituent elements at the plurality of equipment positions based on production job data corresponding to a type of the board; and a guide section which is configured to perform guidance of equipment positions of the two or more constituent elements based on the remaining operation numbers (Nr, Mr) and the operation frequencies (n, m) when the two or more constituent elements are equipped as a result of a change in the type of the board, or, as a result of a portion of the constituent elements which are equipped to the equipment positions reaching the maintenance time, wherein the guide section is configured to perform guidance to equip the constituent elements with small remaining operation numbers (Nr, Mr) to equipment positions with low operation frequencies (n, m), and to equip constituent elements with large remaining operation numbers (Nr, Mr) to equipment positions with high operation frequencies (n, m). <EOS>