EX-99.906 CERT 3 ex99906cert.htm 906 CERTIFICATION ex99906cert.htm
President
Section 906 Certification under Sarbanes Oxley Act


I, Michael G. Clark, certify that:

1.  
I have reviewed this report, filed on behalf of DWS Mid Cap Growth Fund, a series of DWS Investment Trust, on Form N-CSRS;

2.  
Based on my knowledge and pursuant to 18 U.S.C. § 1350, the periodic report on Form N-CSRS (the “Report”) fully complies with the requirements of § 13 (a) or § 15 (d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


May 31, 2011
/s/Michael G. Clark
 
Michael G. Clark
 
President




 
Chief Financial Officer and Treasurer
Section 906 Certification under Sarbanes Oxley Act


I, Paul Schubert, certify that:

1.  
I have reviewed this report, filed on behalf of DWS Mid Cap Growth Fund, a series of DWS Investment Trust, on Form N-CSRS;

2.  
Based on my knowledge and pursuant to 18 U.S.C. § 1350, the periodic report on Form N-CSRS (the “Report”) fully complies with the requirements of § 13 (a) or § 15 (d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


May 31, 2011
/s/Paul Schubert
 
Paul Schubert
 
Chief Financial Officer and Treasurer