< Topic >As enlargement of the device is prevented, compacting the time of the welding operation in the welded zone, throughput of welding it offers the label welding device of the raising of seedling pot which improves. SolutionsThe label interposition section 3 which interposes label 110 in the raising of seedling pot 100 which possesses side wall section 120 and side wall section keeping 120 and label 110, the welded zone being the label welding device of the raising of seedling pot which possesses with the conveying feature 10 which conveys 4 which it welds and raising of seedling pot 100, to have the containment framework body 13 containment raising of seedling pot 100, as for containment framework body 13, the support component 15 which possesses interposition section 151 being installed, as for support component 15, in the extraction attitude which is extracted with the interposition attitude where interposition section 151 is interposed in raising of seedling pot 100 to be attitude alteration possible, in welded zone 4Putting, support component 15 being conveyed in interposition attitude by manipulation means, side wall section it welds with 120 of raising of seedling pot 100 and label 110. < Choice figure >Drawing 2【課題】装置の大型化を防止すると共に、溶着部における溶着動作の時間を短縮して、溶着の処理能力を向上する育苗ポットのラベル溶着装置を提供する。【解決手段】側壁部120を有する育苗ポット100にラベル110を挿入するラベル挿入部3と、側壁部120とラベル110とを挟持して溶着する溶着部4と育苗ポット100を搬送する搬送機構10とを有する育苗ポットのラベル溶着装置であって、育苗ポット100を保持する保持枠体13を備え、保持枠体13は、挿入部151を有する支持部材15が取付けられて、支持部材15は、挿入部151が育苗ポット100に挿入された挿入姿勢と抜出された抜出姿勢とに姿勢変更可能であり、溶着部4において、支持部材15が操作手段によって挿入姿勢で搬送されて育苗ポット100の側壁部120とラベル110とを溶着する。【選択図】図2