All visitors require a valid passport and visa for the duration of their stay. Visa can be obtained from Tanzania Diplomatic Mission or alternatively at the entry points. Zanzibar is a semi-autonomous state within Tanzania, although visitors won’t need a separate Visa to enter, you will need to show your passport on arrival. It is advisable to check with your nearest Tanzanian Embassy or Consulate prior to your travel.
For updated information, visit Tanzanian Immigration website on http://www.immigration.go.tz