# MergerRetriever

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/retrievers/merger_retriever/MergerRetriever)

Retriever that merges the results of multiple retrievers.

## Signature

```python
MergerRetriever()
```

## Extends

- `BaseRetriever`

## Properties

- `retrievers`

## Methods

- [`merge_documents()`](https://reference.langchain.com/python/langchain-classic/retrievers/merger_retriever/MergerRetriever/merge_documents)
- [`amerge_documents()`](https://reference.langchain.com/python/langchain-classic/retrievers/merger_retriever/MergerRetriever/amerge_documents)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/9f232caa7a8fe1ca042a401942d5d90d54ceb1a6/libs/langchain/langchain_classic/retrievers/merger_retriever.py#L11)