diff --git a/modules/elprep/merge/main.nf b/modules/elprep/merge/main.nf
new file mode 100644
index 00000000..d5ffc497
--- /dev/null
+++ b/modules/elprep/merge/main.nf
@@ -0,0 +1,43 @@
+process ELPREP_MERGE {
+    tag "$meta.id"
+    label 'process_low'
+
+    conda (params.enable_conda ? "bioconda::elprep=5.1.2" : null)
+    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
+        'https://depot.galaxyproject.org/singularity/elprep:5.1.2--he881be0_0':
+        'quay.io/biocontainers/elprep:5.1.2--he881be0_0' }"
+
+    input:
+    tuple val(meta), path(bam)
+
+    output:
+    tuple val(meta), path("output/**.{bam,sam}")    , emit: bam
+    path "versions.yml"                             , emit: versions
+
+    when:
+    task.ext.when == null || task.ext.when
+
+    script:
+    def args        = task.ext.args ?: ''
+    def prefix      = task.ext.prefix ?: "${meta.id}"
+    def suffix      = args.contains("--output-type sam") ? "sam" : "bam"
+    def single_end  = meta.single_end ? " --single-end" : ""
+
+    """
+    # create directory and move all input so elprep can find and merge them before splitting
+    mkdir input
+    mv ${bam} input/
+
+    elprep merge \\
+        input/ \\
+        output/${prefix}.${suffix} \\
+        $args \\
+        ${single_end} \\
+        --nr-of-threads $task.cpus
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        elprep: \$(elprep 2>&1 | head -n2 | tail -n1 |sed 's/^.*version //;s/ compiled.*\$//')
+    END_VERSIONS
+    """
+}
diff --git a/modules/elprep/merge/meta.yml b/modules/elprep/merge/meta.yml
new file mode 100644
index 00000000..1f49b1a0
--- /dev/null
+++ b/modules/elprep/merge/meta.yml
@@ -0,0 +1,44 @@
+name: "elprep_merge"
+description: Merge split bam/sam chunks in one file
+keywords:
+  - bam
+  - sam
+  - merge
+tools:
+  - "elprep":
+      description: "elPrep is a high-performance tool for preparing .sam/.bam files for variant calling in sequencing pipelines. It can be used as a drop-in replacement for SAMtools/Picard/GATK4."
+      homepage: "https://github.com/ExaScience/elprep"
+      documentation: "https://github.com/ExaScience/elprep"
+      tool_dev_url: "https://github.com/ExaScience/elprep"
+      doi: "10.1371/journal.pone.0244471"
+      licence: "['AGPL v3']"
+
+input:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - bam:
+      type: file
+      description: List of BAM/SAM chunks to merge
+      pattern: "*.{bam,sam}"
+
+output:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  #
+  - versions:
+      type: file
+      description: File containing software versions
+      pattern: "versions.yml"
+  - bam:
+      type: file
+      description: Merged BAM/SAM file
+      pattern: "*.{bam,sam}"
+
+authors:
+  - "@matthdsm"
diff --git a/tests/config/pytest_modules.yml b/tests/config/pytest_modules.yml
index dfcbfa8c..dcf85ba0 100644
--- a/tests/config/pytest_modules.yml
+++ b/tests/config/pytest_modules.yml
@@ -603,6 +603,10 @@ elprep/filter:
   - modules/elprep/filter/**
   - tests/modules/elprep/filter/**
 
+elprep/merge:
+  - modules/elprep/merge/**
+  - tests/modules/elprep/merge/**
+
 elprep/split:
   - modules/elprep/split/**
   - tests/modules/elprep/split/**
diff --git a/tests/modules/elprep/merge/main.nf b/tests/modules/elprep/merge/main.nf
new file mode 100644
index 00000000..b4a40ce3
--- /dev/null
+++ b/tests/modules/elprep/merge/main.nf
@@ -0,0 +1,17 @@
+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl = 2
+
+include { ELPREP_SPLIT } from '../../../../modules/elprep/split/main.nf'
+include { ELPREP_MERGE } from '../../../../modules/elprep/merge/main.nf'
+
+workflow test_elprep_merge {
+
+    input = [
+        [ id:'test', single_end:false ], // meta map
+        file(params.test_data['homo_sapiens']['illumina']['test_paired_end_sorted_bam'], checkIfExists: true)
+    ]
+
+    ELPREP_SPLIT ( input )
+    ELPREP_MERGE ( ELPREP_SPLIT.out.bam )
+}
diff --git a/tests/modules/elprep/merge/nextflow.config b/tests/modules/elprep/merge/nextflow.config
new file mode 100644
index 00000000..4e4570f4
--- /dev/null
+++ b/tests/modules/elprep/merge/nextflow.config
@@ -0,0 +1,5 @@
+process {
+    withName : ELPREP_MERGE {
+        publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }
+    }
+}
diff --git a/tests/modules/elprep/merge/test.yml b/tests/modules/elprep/merge/test.yml
new file mode 100644
index 00000000..ad2ecfef
--- /dev/null
+++ b/tests/modules/elprep/merge/test.yml
@@ -0,0 +1,8 @@
+- name: elprep merge test_elprep_merge
+  command: nextflow run tests/modules/elprep/merge -entry test_elprep_merge -c tests/config/nextflow.config
+  tags:
+    - elprep
+    - elprep/merge
+  files:
+    - path: output/elprep/output/test.bam
+    - path: output/elprep/versions.yml