After a long time searching for Cambodia\'s Tourist Visa, Finally i got the information of visa requirement from wikitravel which i would like to share when travel to Cambodia.
All visitors, except citizens of Malaysia, Singapore, Philippines, Laos, Indonesia, Thailand and Vietnam need a visa to enter Cambodia. The official price for a tourist visa is US$20, and US$25 for a business visa - but expect much higher prices (US$30 or more for the tourist visa) to be demanded at land border crossings.
Visas can be obtained at any Cambodian embassy or consulate overseas. Visas are also available \"on arrival\" at both international airports, all six international border crossings with Thailand, some international border crossings with Vietnam, and at the main border crossing with Laos.
Tourist visa: when applied for in advance, these are valid for 90 days (ie must be used within 3 months), and good for a 30 day entry permit stamp which can be extended once only for a further 30 days in Phnom Penh (or elsewhere via agencies) at a cost of US$15.
Business visa: the best choice for stays over two months and/or multiple entries, as they can be extended indefinitely (approx US$140 per 6 month extension) and have multiple entry status when extended. Most Phnom Penh travel agencies process the extensions.
To apply for a visa, you will need one or two (depending on where you apply) passport-size photo(s), a passport which is valid for at least 6 months and has at least one completely blank visa page remaining, passport photocopies when applying at some embassies/consulates (not needed if applying on arrival), and clean US$ notes with which to pay the fee (expect to pay a substantially higher price if paying in a local currency).
In Poipet, Cambodia custom officers are known to ask tourists to pay 1000 Baht (about US$30) for a visa on arrival, instead of US$25. Stand firm but stay friendly and keep your smile, they rarely insist it. The penalty for having no photo is usually only US$1-2, but the price is also negotiable.
The original provider of the e-Visa service was kicked out in murky circumstances, and their site now rails against the evils of the new provider. However, travellers who have obtained e-Visas with the new system report no problems using them.
Alternatively, citizens of most nations can now apply for an e-Visa online. The cost is US$25 (US$20 + US$5 processing charge) instead of the normal US$20, and you get the visa by e-mail in 3 business days. For the e-visa you will need one photograph of yourself. You can scan your passport photo (into .jpg format, please!) or take a passport photograph of yourself with a digital camera. Please take note that e-Visa is currently operated by a private Malaysian Company.
The e-visa will come back as a PDF file. You will then need to print out two copies (one for the entry and one for the exit). After printing out your two copies, cut out the e-visa part and put both copies into your passport.
For those entering by air, the e-Visa is valid at both Phnom Penh and Siem Reap airports. It\'s cheaper to get your visa on arrival at either airport. However if you get a visa in advance (online or from an embassy/consulate) you do get to skip two lines at the airport: the line to apply for the visa, and the line at the cashier to pay the fee. Of course, if you checked luggage, you\'ll probably have to spend the saved time waiting for your bag.
For those entering overland, do note that overland e-Visa entries are restricted to just three border crossings: Bavet (Svay Rieng) from Moc Bai (Tay Ninh Province, Vietnam); Koh Kong (from Hat Lek / Trat, Thailand); and Poipet (from Aranyaprathet, Thailand). However getting a visa in advance (online or from an embassy/consulate) is definitely the way to go in order to avoid the common scam of visa overpricing at border crossings (see Scam alert).
If you don\'t have a passport photo at visa on arrival in Phnom Penh airport (and possibly other entry points), they will scan in the one on your passport for an extra $2.
If you are a foreign national, be aware that you will have to pay an airport departure tax when you leave Cambodia through the airports, about $25 for international flights, it is about $4-6 for internal flights between Phnom Penh and Siem Reap. Furthermore, there is also few countries Visa Requirements on www.evisaasia.com.