Thanks Gert,

that´s quite crafty. One or two minor details, though:

I would like, if possible to avoid the use of an inputbox.
The macro still adds sheets called sheet 5, sheet 6, sheet 7 etc - can
I avoid this problem?

/Heine
Gert wrote:
the extended version

Sub SheetInsert()


Dim strNameSheet As String
Dim boolFound As Boolean
Dim MySheets As Worksheet

Sheets.Add
boolFound = False
strNameSheet = InputBox("give sheet name")
For Each MySheets In Worksheets
If MySheets.Name = strNameSheet Then boolFound = True
Next
If boolFound Then
MsgBox ("this sheet already exists")
Else
ActiveSheet.Name = strNameSheet
End If

End Sub