A printing jig comprising: bases to be fitted to a printing apparatus ; a first holder able to hold one or more first substrates and fittable to each of the bases ; and a second holder able to hold one or more second substrates different in size from the first substrate or substrates and fittable to each of the bases ; wherein the first holder includes a first fitting portion to be fitted to each of the bases ; the second holder includes a second fitting portion to be fitted to each of the bases ; each of the bases is structured such that the first fitting portion and the second fitting portion are both fittable thereto; the first holder includes: a first docking plate including the first fitting portion ; and one or more first substrate holders to be fitted to the first docking plate to hold the first substrate or substrates ; the second holder includes: a second docking plate including the second fitting portion , the second docking plate being different from the first docking plate ; and one or more second substrate holders to be fitted to the second docking plate to hold the second substrate or substrates , the one or more second substrate holders being different from the first substrate holders . bases to be fitted to a printing apparatus ; a first holder able to hold one or more first substrates and fittable to each of the bases ; and a second holder able to hold one or more second substrates different in size from the first substrate or substrates and fittable to each of the bases ; wherein the first holder includes a first fitting portion to be fitted to each of the bases ; the second holder includes a second fitting portion to be fitted to each of the bases ; each of the bases is structured such that the first fitting portion and the second fitting portion are both fittable thereto; the first holder includes: a first docking plate including the first fitting portion ; and one or more first substrate holders to be fitted to the first docking plate to hold the first substrate or substrates ; the second holder includes: a second docking plate including the second fitting portion , the second docking plate being different from the first docking plate ; and one or more second substrate holders to be fitted to the second docking plate to hold the second substrate or substrates , the one or more second substrate holders being different from the first substrate holders . a first docking plate including the first fitting portion ; and one or more first substrate holders to be fitted to the first docking plate to hold the first substrate or substrates ; the second holder includes: a second docking plate including the second fitting portion , the second docking plate being different from the first docking plate ; and one or more second substrate holders to be fitted to the second docking plate to hold the second substrate or substrates , the one or more second substrate holders being different from the first substrate holders . a second docking plate including the second fitting portion , the second docking plate being different from the first docking plate ; and one or more second substrate holders to be fitted to the second docking plate to hold the second substrate or substrates , the one or more second substrate holders being different from the first substrate holders . <EOS>