Help in identifying an insect
Once again, this is a  longhorn beetle (Cerambycidae).

The overall appearance fits well with the subfamily Lamiinae (flat-faced longhorns). I would also guess it's in the Batocerini tribe. Though I don't think this is your species, per se, here is an image of a female Batocera rufomaculata with white stripe for comparison:



Once you provide more information about location I can give you a more precise answer.

Monochamus scutellatus is almost certainly incorrect. Notice the lighter coloration , wider body shape, and presence of a lateral white stripe along the side of the OP's insect vs that of M. scutellatus.