SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                             ----------------------

                                   F O R M 6-K

       REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                         For the month of September 2008

                                 RADVISION LTD.
                              (Name of Registrant)


               24 Raoul Wallenberg Street, Tel Aviv 69719, Israel
                     (Address of Principal Executive Office)

                  Indicate by check mark whether the registrant files or will
file annual reports under cover of Form 20-F or Form 40-F.

                           Form 20-F [X]    Form 40-F [ ]

                  Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): [ ]

                  Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): [ ]

                  Indicate by check mark whether by furnishing the information
contained in this Form, the registrant is also thereby furnishing the
information to the Commission pursuant to Rule 12g3-2(b) under the Securities
Exchange Act of 1934.

                                 Yes [ ] No [X]

                  If "Yes" is marked, indicate below the file number assigned to
the registrant in connection with Rule 12g3-2(b): 82-_________


This Form 6-K is being incorporated by reference into the Registrant's Form S-8
Registration Statements File Nos. 333-45422, 333-53814, 333-55130, 333-66250,
333-82488, 333-104377, 333-116964, 333-127013 and 333-141654.





                                 RADVision Ltd.

6-K Items


     1.   Press release re RADVISION Chairman Purchases  Additional Shares dated
          September 16, 2008.








                                                                          ITEM 1







Press Release                                                  Source: RADVISION

RADVISION Chairman Purchases Additional Shares

Tuesday September 16, 9:00 am ET

TEL AVIV, Israel--(BUSINESS WIRE)--RADVISION (Nasdaq: RVSN - News), a leading
provider of video network infrastructure and developer tools for unified visual
communications over IP, 3G, and emerging next-generation IMS networks, reported
today that Zohar Zisapel, Chairman of the Board, purchased 828,761 shares of the
Company in the open market in the period beginning August 4 through September
15. The total amount invested by Mr. Zisapel for those shares was approximately
$5.7 million at an average price of $6.86 per share.

Mr. Zisapel commented: "RADVISION stands alone as the only independent video
network infrastructure provider. Management is making tangible progress in its
plan to leverage this opportunity. My continued investment in RADVISION reflects
my full confidence in the Company and its future."

About RADVISION

RADVISION (Nasdaq: RVSN - News) is the industry's leading provider of
market-proven products and technologies for unified visual communications over
IP, 3G and IMS networks. With its complete set of standards-based video
networking infrastructure and developer toolkits for voice, video, data and
wireless communications, RADVISION is driving the unified communications
evolution by combining the power of video, voice, data and wireless - for high
definition video conferencing systems, innovative converged mobile services, and
highly scalable video-enabled desktop platforms on IP, 3G and emerging
next-generation IMS networks. To gain additional insights into our products,
technology and opinions, visit blog.radvision.com. For more information about
RADVISION, visit www.radvision.com.

This press release contains forward-looking statements that are subject to risks
and uncertainties. Factors that could cause actual results to differ materially
from these forward-looking statements include, but are not limited to, general
business conditions in the industry, changes in demand for products, the timing
and amount or cancellation of orders and other risks detailed from time to time
in RADVISION's filings with the Securities Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.

Contact:
RADVISION
Adi Sfadia, +1-201-689-6340
Chief Financial Officer
cfo@radvision.com
or
Comm-Partners LLC
June Filingeri, +1-203-972-0186
junefil@optonline.net







                                    SIGNATURE


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                 RADVISION LTD.
                                    (Registrant)



                                 By /s/ Rael Kolevsohn
                                    ------------------
                                    Rael Kolevsohn
                                    Corporate Vice President and General Counsel


Date: September 16, 2008