Here's how you can remove a publication page and/or full-text from your profile or from ResearchGate entirely: Visit the Research tab on your profile and scroll down to the research item. Click on the downward-facing arrow underneath the item's title. Select Remove.

https://explore.researchgate.net/display/support/How+to+make+content+private+or+remove+it#:~:text=Here's%20how%20you%20can%20remove,Select%20Remove

@Mostafa Sameer

Thanks for your answer. But I can't see it on my profile, because I removed it from my profile, and now I want to remove it from researchgate, but i don't know how can I do it.

You have to claim it again as author, thus adding it it to your profile again. Then follow the instructions given by Mostafa Sameer . But see also the section "Why can't I remove a publication page or full-text?" in https://explore.researchgate.net/display/support/How+to+make+content+private+or+remove+it .

Thank you so much. It was helpful. @wolfgang R.Dick