Sub essai()
Dim dercol As Integer, derlin As Integer, tablo
Dim n As Integer, m As Integer, col As Integer, y As Range
dercol = Sheets("Feuil1").Cells(1, Columns.Count).End(xlToLeft).Column
derlin = Sheets("Feuil1").Range("A" & Rows.Count).End(xlUp).Row
tablo = Sheets("Feuil1").Range(Cells(1, 1).Address & ":" & Cells(derlin, dercol).Address)
Sheets("Feuil1").Range(Cells(1, 1).Address & ":" & Cells(derlin, dercol).Address).ClearContents
Sheets("Feuil2").Rows(1).Copy Destination:=Sheets("Feuil1").Range("A1")
Application.ScreenUpdating = False
For n = LBound(tablo, 2) To UBound(tablo, 2)
Set y = Sheets("Feuil1").Rows(1).Find(tablo(LBound(tablo, 1), n), LookIn:=xlValues, lookat:=xlWhole)
col = y.Column
For m = LBound(tablo, 1) + 1 To UBound(tablo, 1)
Sheets("Feuil1").Cells(m, col) = tablo(m, n)
Next
Next
Application.ScreenUpdating = False
End Sub