In this paper, we propose SimdBench, a new benchmark that focuses on SIMD intrinsic code generation. SimdBench contains 136 tasks for five representative SIMD intrinsics: SSE, AVX, Neon, SVE, and RVV. We evaluate 18 representative LLMs with SimdBench and find that the accuracy of SIMD intrinsic code generation is generally lower than that of scalar code generation. Through this, we suggest the future direction of LLMs in the field of SIMD intrinsic code generation and contribute to the research community by open-sourcing SimdBench.