Excel is your spradsheet program and outlook your contact program. Are you trying to import addresses and contact info? If you are doing what I think you are, try highlighting only the needed info and cutting and pasting into a new spreadsheet then exporting it.
Which outlook program are you trying to import the data to MS Outlook or Outlook Express?
If using MS Outlook you can use import/export from the file menu!
If you are using Outlook Express, the only way i can think of is to export the table from Excel into an MS Access table, and then export that table as a CSV (Comma Seperated Value) file From there you can import data from a CSV file! (although i've never tried it)