{{Single infobox |
  Name           = Ambitious! Yashinteki de Ii Jan|
  Cover          = Single30v.jpg |225px |
  Artist         = [[Morning Musume]] | 
  from Album     =  |
  Released       = [[June 21]], [[2006]] <small>([[Japan|JP]])</small> |
  Format         = [[CD Single]] |
  Recorded       = [[2006]] |
  Genre          = [[J-pop|Japanese Pop]] |
  Length         = |
  Label          = [[Zetima]] |
  Producer       = [[Tsunku]] |
  Chart position = |
  Reviews        = |
  Last single    = "[[Sexy Boy ~Soyo Kaze ni Yorisoutte~]]"<br />(2006)|
  This single    = '''"Ambitious! Yashinteki de Ii Jan"'''<br />(2006) |
  Next single    = |
}}
{{nihongo|"'''Ambitious! Yashinteki de Ii Jan'''"|Ambitious！野心的でいいじゃん|}} is the thirtieth single of [[J-pop]] idol group [[Morning Musume]]. It was released on [[June 21]], [[2006]]. 

There are regular and limited edition versions of this single. The limited edition comes with a DVD containing comments from the members and two performances from their [[Rainbow 7]] concert tour, [[Aozora ga Itsumademo Tsuzuku You na Mirai de Are!]], and [[Sexy Boy ~Soyo Kaze ni Yorisoutte~]]. It also comes with 10 interchangeable covers, one featuring each member.

The [[Single V]] was released on [[June 28]] [[2006]].

This is the last single for [[Asami Konno]] and [[Makoto Ogawa]] due to their graduations.

==Track listings==
===CD===
#  Ambitious！野心的でいいじゃん (Ambitious! Yashinteki de Ii Jan)
#  わたしがついてる。 (Watashi ga Tsuiteru.)
#  Ambitious！野心的でいいじゃん（Instrumental） (Ambitious! Yashinteki de Ii Jan (Instrumental)) 

===Single V DVD===
#  Ambitious！野心的でいいじゃん (Ambitious! Yashinteki de Ii Jan)
#  Ambitious！野心的でいいじゃん(Dance Shot Ver.) (Ambitious! Yashinteki de Ii Jan (Dance Shot Ver.))
#  メイキング映像 (Making Of) 

==Members at time of single==
*[[Hitomi Yoshizawa]]
*[[Ai Takahashi]]
*[[Risa Niigaki]]
*[[Makoto Ogawa]](Last Single)
*[[Asami Konno]](Last Single)
*[[Miki Fujimoto]]
*[[Reina Tanaka]]
*[[Eri Kamei]]
*[[Sayumi Michishige]]
*[[Koharu Kusumi]]

{{Morning Musume}}

[[Category:Morning Musume songs]]
[[Category:Zetima Records singles]]
[[Category:2006 singles]]

[[ja:Ambitious! 野心的でいいじゃん]]